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TNPSC Group IV · Flashcards

TNPSC Group IV flashcards

862 cards from 75 fact-checked topic notes · English

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Silappathikaram — General Tamil — Eligibility-cum-Scoring Test · 12 cards
Author — Ilango Adigal
A Jain ascetic prince, younger brother of Chera king Senguttuvan. He renounced royal life and composed this epic. The prologue (patikam) states he heard the story from the poet Seethalai Sathanar (who later wrote Manimekalai).
Structure — Three Kandams
The epic is divided into three sections based on the three Tamil kingdoms: Puhar Kandam (Chola), Madurai Kandam (Pandya), and Vanji Kandam (Chera). It contains 30 chapters (kaathais) in total.
Central Theme — Karpu and Justice
The epic glorifies Kannagi's chastity (karpu) and her righteous anger when injustice befalls her husband. The famous line "Arasan seitha pizhaiyu arasan mudi mel" emphasises that kings too must face consequences for their errors.
Silambu — The Anklet as Symbol
The anklet serves as the central symbol. Kannagi's anklets contained rubies, while the queen's stolen anklet had pearls — this distinction proves Kovalan's innocence.
Non-sectarian Nature
Though Ilango was Jain, the epic treats Jainism, Buddhism, and Hinduism with equal respect, depicting temples, festivals, and rituals of all three faiths.
Realistic Social Portrayal
The epic provides authentic details of urban life in Puhar, Madurai, and Vanji — their markets, art forms, festivals, and social customs.
First Tamil Epic with Definite Authorship
Unlike Sangam anthologies with multiple poets, Silappathikaram has a single known author, marking a transition in Tamil literary tradition.
Author
Ilango Adigal (இளங்கோ அடிகள்)
Period
Approximately 2nd century CE (Post-Sangam)
Meaning of Title
சிலம்பு (Anklet) + அதிகாரம் (Story) = Tale of the Anklet
Total Chapters
30 Kaathais (காதைகள்)
Three Kandams
Puhar (10), Madurai (13), Vanji (7)
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Tamil Grammar (Ilakkanam) — General Tamil — Eligibility-cum-Scoring Test · 12 cards
Eluthu (எழுத்து)
Tamil has 247 letters — 12 vowels (uyir), 18 consonants (mei), 216 compound letters (uyirmei), and 1 special character (aytham ஃ). This 12+18+216+1 = 247 classification is fundamental.
Sol (சொல்)
Words are classified by origin into four types — Iyarcol (native Tamil), Thisaicol (regional/dialectal), Vadacol (Sanskrit borrowings), and Thiricol (literary words shaped for poetry).
Sol by Grammar Function
Words are also classified as Peyarcol (noun), Vinaisol (verb), Idaisol (particle/conjunction), and Uricol (adjective/adverb with emphasis).
Porul (பொருள்)
Classical Tamil literature follows Aham (love/inner themes) and Puram (war/heroism/outer themes). Aham has five thinais (landscapes) each associated with specific emotions.
Yappu (யாப்பு)
Tamil prosody studies the structure of verse — asai (syllable unit), seer (metrical foot), thalai (linkage), adi (line), and thodai (rhyme/ornament).
Ani (அணி)
Figures of speech beautify language. Key types include Uvamai (simile), Uruvagam (metaphor), Tharpugazhchi (self-praise for effect), and Pirandiyal (contrast/irony).
Punarchi (புணர்ச்சி)
Sandhi rules govern how letters and words join. The two main types are Iyalpunarchi (natural joining) and Vikarapunarchi (joining with a change — a letter added, altered or dropped).
Uyir eluthu (vowels)
Classification: அ, ஆ, இ, ஈ, உ, ஊ, எ, ஏ, ஐ, ஒ, ஓ, ஔ · Count/Details: 12 letters
Mei eluthu (consonants)
Classification: க், ங், ச், ஞ், ட், ண், த், ந், ப், ம், ய், ர், ல், வ், ழ், ள், ற், ன் · Count/Details: 18 letters
Uyirmei (compound)
Classification: Each mei + each uyir · Count/Details: 18 × 12 = 216
Kuril (short vowels)
Classification: அ, இ, உ, எ, ஒ · Count/Details: 5 vowels
Nedil (long vowels)
Classification: ஆ, ஈ, ஊ, ஏ, ஐ, ஓ, ஔ · Count/Details: 7 vowels
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Eluthu (Letters) — General Tamil — Eligibility-cum-Scoring Test · 12 cards
Total Tamil Letters = 247
This includes 12 uyir (vowels) + 18 mei (consonants) + 216 uyirmei (compound letters) + 1 aaytha eluthu (ஃ).
Uyir Eluthu (உயிர் எழுத்து)
The 12 vowels that give "life" to consonants. They are: அ, ஆ, இ, ஈ, உ, ஊ, எ, ஏ, ஐ, ஒ, ஓ, ஔ.
Mei Eluthu (மெய் எழுத்து)
The 18 consonants that represent "body" sounds. They cannot be pronounced independently without a vowel. Examples: க், ங், ச், ஞ், ட், ண், த், ந், ப், ம், ய், ர், ல், வ், ழ், ள், ற், ன்.
Uyirmei Eluthu (உயிர்மெய் எழுத்து)
Compound letters formed by combining each of the 18 mei with each of the 12 uyir = 18 × 12 = 216 letters. Example: க் + அ = க; க் + ஆ = கா.
Aaytha Eluthu (ஆய்த எழுத்து)
The unique Tamil letter ஃ (called "aakkena"). It has special status — neither pure vowel nor consonant. It appears only after a short letter (kuril) and before a vallinam uyirmei letter. Example: அஃது.
Maaththirai (மாத்திரை)
Unit of pronunciation time. Kuril = 1 maaththirai, Nedil = 2 maaththirai, Mei = ½ maaththirai, Aaytha eluthu = ½ maaththirai.
Kuril and Nedil Classification
Short vowels (kuril) = அ, இ, உ, எ, ஒ (5 letters). Long vowels (nedil) = ஆ, ஈ, ஊ, ஏ, ஐ, ஓ, ஔ (7 letters).
Three Unique Tamil Letters
ழ், ள், ற் — these sounds do not exist in classical Sanskrit (the sister Dravidian language Malayalam also has them).
Uyir (Vowels)
Count: 12 · Maaththirai: Kuril: 1, Nedil: 2
Mei (Consonants)
Count: 18 · Maaththirai: ½
Uyirmei (Compounds)
Count: 216 · Maaththirai: Same as base uyir
Aaytha Eluthu
Count: 1 · Maaththirai: ½
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Subramania Bharathi — General Tamil — Eligibility-cum-Scoring Test · 12 cards
Pioneer of Modern Tamil Poetry
Bharathi liberated Tamil verse from rigid classical forms, introducing conversational Tamil and contemporary themes accessible to ordinary readers.
Patriotic Poetry (Desiya Geetangal)
His songs like "Vande Mataram," "Senthamizh Naadu," and "Achamillai Achamillai" became anthems of the freedom movement, inspiring millions to resist British rule.
Women's Empowerment
Bharathi was remarkably progressive—his "Pudhumai Penn" (New Woman) envisioned educated, independent women as equals to men, revolutionary for his era.
Caste Annihilation
He vehemently opposed untouchability and caste discrimination, declaring "Jathi Illai" (No Caste) and advocating human equality.
Spiritual and Philosophical Depth
Beyond politics, Bharathi wrote devotional songs on Shakti, Kannan (Krishna), and explored Vedantic philosophy while remaining rooted in Tamil tradition.
Journalistic Contributions
He edited influential nationalist journals—India, Vijaya, Bala Bharatham, and Suryothayam—using them as platforms for political awakening.
Exile in Pondicherry
Fleeing British arrest warrants, Bharathi lived in French-controlled Pondicherry (1908–1918), continuing his literary and revolutionary activities.
Influence of World Literature
Bharathi drew inspiration from Shelley, Whitman, and Bengali poets, blending Western romantic ideals with Tamil literary heritage.
Birth
December 11, 1882
Birthplace
Ettayapuram, Tirunelveli District
Parents
Chinnaswami Iyer and Lakshmi Ammal
Death
September 11, 1921 (Triplicane, Chennai)
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Tholkappiyam — General Tamil — Eligibility-cum-Scoring Test · 12 cards
Author and Tradition
Tholkappiyar composed the text; Athangottu Asan authenticated it according to the preface (payiram). Tholkappiyar is traditionally considered a student of Sage Agastya.
Three Adhikarams (Major Divisions)
The entire work is divided into Eluthu Adhikaram (letters/phonology), Sol Adhikaram (words/morphology), and Porul Adhikaram (meaning/poetics).
Structure — Iyals within Adhikarams
Each adhikaram contains multiple iyals (chapters). The total comprises 9 + 9 + 9 = 27 iyals (some traditions count minor variations).
Nool and Payiram
The text begins with a payiram (preface) that describes authorship and context. "Nool" refers to the main treatise.
Prescriptive Grammar
Tholkappiyam prescribes rules for correct Tamil usage — it is a "grammar of grammar" for subsequent literary works.
Aham and Puram Classification
The Porul Adhikaram introduces the iconic classification of Tamil poetry into aham (inner/love themes) and puram (outer/heroic-war themes).
Tinai Concept
Five landscapes (tinais) — Kurinji, Mullai, Marutham, Neithal, Palai — are linked to specific emotions, times, deities, and occupations.
Oldest Surviving Work
Though Sangam poems exist, Tholkappiyam predates most surviving anthologies, making it the anchor text of Tamil literary tradition.
Author
Tholkappiyar
Teacher of author
Sage Agastya (tradition)
Authenticator
Athangottu Asan (per payiram)
Total iyals
27 (9 per adhikaram)
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Synonyms and Antonyms — General Tamil — Eligibility-cum-Scoring Test · 12 cards
Otrumai Chol (ஒத்த சொல்)
Words that share the same or nearly the same meaning. Example: அழகு = எழில் = சீர் (all mean beauty).
Ethirchol (எதிர்ச்சொல்)
Words that express opposite meanings. Example: இன்பம் ↔ துன்பம் (happiness ↔ sorrow).
Porul Oppu (பொருள் ஒப்பு)
Synonyms may not be exact equivalents; context determines which synonym fits. நண்பன் and தோழன் both mean friend, but usage differs in literary vs spoken Tamil.
Word Roots Matter
Many Tamil words share common roots. Recognising roots like "அன்பு" (love), "வலி" (pain/strength), or "ஒளி" (light) helps identify related words quickly.
Classical vs Modern Usage
Some synonyms are literary (இரவி = sun) while others are colloquial (சூரியன் = sun). TNPSC tests both registers.
Prefix and Suffix Patterns
Antonyms often form through prefixes. நன்மை ↔ தீமை (good ↔ evil) shows how "நல்" and "தீ" function as opposing roots.
Context-Dependent Meaning
A word may have multiple synonyms depending on context. "கண்" can mean eye, but also place (இடம்) in different contexts — recognise which meaning the question targets.
அழகு
எழில், சீர், அழகியம், செவ்வி
கடல்
ஆழி, சமுத்திரம், பரவை, நீராழி
மலை
குன்று, சிகரம், கிரி, வரை
நிலவு
மதி, திங்கள், சந்திரன், அம்புலி
சூரியன்
ஞாயிறு, பகலவன், இரவி, பரிதி
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Manimekalai — General Tamil — Eligibility-cum-Scoring Test · 12 cards
Author and Title
Seethalai Sathanar (Koolavanikar Sathanar) composed Manimekalai. The title refers to both the protagonist's name and means "girdle of gems" — a jewelled belt she wears.
Sequel Connection
The epic begins where Silappathikaram ends. Manimekalai is the daughter of Kovalan (hero of Silappathikaram) and the dancer Madhavi. After Kannagi's death, Madhavi renounces the world, inspiring her daughter's spiritual journey.
Buddhist Epic
This is the only surviving Tamil epic that propagates Buddhist philosophy. It presents the Four Noble Truths, the concept of karma, rebirth, and the path to Nirvana through renunciation.
Amudha Surabhi (Akshaya Patra)
The magical never-emptying bowl given to Manimekalai by the goddess Manimekala Theivam. It symbolizes compassion — food appears in it only to feed the hungry.
Theme of Renunciation
The central theme is Manimekalai's rejection of worldly pleasures and romantic love (from prince Udayakumaran) to pursue spiritual enlightenment.
Geographic Spread
The story moves across multiple cities — Puhar, Vanji, Kanchi, and the island of Manipallavam — providing a cultural map of ancient Tamil Nadu and beyond.
Critique of Other Religions
The epic contains detailed debates where Buddhist philosophy is compared with and argued against Shaiva, Vaishnava, Jaina, Ajivika, and other schools of thought.
Author
Seethalai Sathanar (Koolavanikar Sathanar)
Number of Cantos
30 Kaathais
Total Lines
Approximately 4,861 lines
Religion Propagated
Buddhism
Predecessor Epic
Silappathikaram by Ilango Adigal
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Sol (Words) — General Tamil — Eligibility-cum-Scoring Test · 12 cards
Sol (சொல்) Definition
A meaningful combination of letters that conveys a complete sense. According to Tholkappiyam, sol is formed by joining letters (elutthu) and carries meaning (porul).
Two Classification Systems
Tamil grammar classifies words in two ways — by origin/source (நான்கு வகை சொல்) and by grammatical function (நான்கு இலக்கண வகை).
Peyar Sol Sub-types
Includes Idal Peyar (given names), Sutti Peyar (demonstrative), Vinai Peyar (verbal noun), Thozhir Peyar (action noun, e.g. நடத்தல்), and Kala Peyar (time noun).
Thinai and Paal in Peyar
Nouns are classified by Thinai (உயர்திணை for rational beings, அஃறிணை for others) and Paal (ஆண்பால், பெண்பால், பலர்பால், ஒன்றன்பால், பலவின்பால்).
Vinai Sol Classification
Verbs are classified by tense (கால வினை) — past (இறந்த காலம்), present (நிகழ் காலம்), future (எதிர் காலம்) — and by form (தெரிநிலை வினை, குறிப்பு வினை).
Iyar Sol
Types: Pure Tamil words · Examples: தலை, கண், நீர், மரம்
Thisai Sol
Types: Dialect words · Examples: தள்ளை (mother, Kuttanadu), ஞமலி (dog, Poozhi nadu)
Vadai Sol
Types: Sanskrit borrowings · Examples: புத்தகம், விஷயம், ராஜா
Thiri Sol
Types: Literary/poetic words · Examples: கிள்ளை (parrot), வெற்பு (hill)
Peyar Sol
Types: Naming word (Noun) · Examples: மாணவன், பள்ளி, அழகு
Vinai Sol
Types: Action word (Verb) · Examples: படித்தான், எழுதுகிறாள்
Idai Sol (Grammar)
Types: Particle/Connector · Examples: ஐ, ஆல், உம், ஓ
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Bharathidasan — General Tamil — Eligibility-cum-Scoring Test · 12 cards
Original Name and Birth
Born as Kanakasabai Subburathinam on 29 April 1891 in Puducherry (then French India). His pen name "Bharathidasan" means "disciple of Bharathi."
Guru-Disciple Bond
Met Subramania Bharathi in 1908 and became his devoted student. This meeting transformed his life and literary direction. He considered Bharathi his poetic father.
Rationalist Philosophy
Unlike devotional poets, Bharathidasan rejected superstition and blind faith. He promoted scientific temper, self-respect, and reason through his poetry.
Dravidian Movement Connection
His works became anthems for the Justice Party, Self-Respect Movement, and later Dravidar Kazhagam. Periyar E.V. Ramasamy and the Dravidian ideology found poetic expression through him.
Social Reform Themes
Consistent focus on eradicating caste, empowering women, widow remarriage, inter-caste marriage, and attacking Brahminical orthodoxy.
Tamil Pride (Tamilnadu)
Celebrated Tamil language, Tamil land, and Tamil identity. Coined powerful phrases glorifying Tamil as a divine language deserving worship.
Literary Style
Combined classical metres with modern themes. Used simple, direct Tamil accessible to ordinary people while maintaining poetic excellence.
Death and Legacy
Died on 21 April 1964 in Chennai. Tamil Nadu government declared his birthday (29 April) as "Pavendhar Day." His works remain essential reading in Tamil schools.
Original Name
Kanakasabai Subburathinam
Birth Date
29 April 1891
Birthplace
Puducherry (Pondicherry)
Death Date
21 April 1964
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Sangam Literature — General Tamil — Eligibility-cum-Scoring Test · 12 cards
Three Sangams
Tradition speaks of three literary academies — First Sangam at Then Madurai (submerged), Second Sangam at Kapatapuram, and Third Sangam at present Madurai. Only Third Sangam works survive today.
Aham and Puram Classification
All Sangam poetry divides into Aham (inner/love themes dealing with personal emotions) and Puram (outer/heroic themes dealing with war, valor, death, and public life).
Tinai Concept
Five landscape-mood associations (Kurinji-mountains/union, Mullai-forest/waiting, Marutham-farmland/quarrel, Neithal-seashore/pining, Palai-desert/separation) structure Aham poetry.
Tholkappiyam's Primacy
Authored by Tholkappiyar (disciple of Agastya), it predates all surviving Sangam poetry and serves as the grammatical and literary framework for the entire corpus.
Ettuthogai and Pathupattu
The Sangam corpus organizes into eight anthologies (Ettuthogai) of shorter poems and ten idylls (Pathupattu) of longer poems.
Pathinen Keezhkanakku
Eighteen post-Sangam didactic works including Thirukkural belong to a later ethical literature phase, distinct from classical Sangam poetry.
Patron Kings
Chera, Chola, and Pandya kings patronized Sangam poets. Famous patrons include Karikala Chola, Nedunchezhiyan Pandya, and Senguttuvan Chera.
Tholkappiyam
Oldest Tamil grammar; 3 divisions (Adhikarams) — Eluthu (letters), Sol (words), Porul (meaning); 9 chapters (Iyals) in each; Author: Tholkappiyar
Ettuthogai (8 Anthologies)
Narrinai, Kurunthogai, Aingurunuru, Pathitruppathu, Paripatal, Kalithogai, Ahananooru, Purananooru
Pathupattu (10 Idylls)
Thirumurugatrupadai, Porunaratrupadai, Sirupanatrupadai, Perumpanatrupadai, Mullaippattu, Maturaikkanci, Nedunalvaadai, Kurincipattu, Pattinappaalai, Malaipadukadam
Aham Works in Ettuthogai
Narrinai, Kurunthogai, Aingurunuru, Kalithogai, Ahananooru (5 works)
Puram Works in Ettuthogai
Pathitruppathu, Purananooru (2 works)
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Ettuthogai — General Tamil — Eligibility-cum-Scoring Test · 12 cards
Aham and Puram Division
Five anthologies belong to Aham (love themes), two to Puram (war and heroic themes), and one (Paripatal) mixes both. This is the fundamental classification principle.
Tinai System
Aham poetry uses five landscape-based themes (Kurinji, Mullai, Marutham, Neithal, Paalai), each representing a phase of love and associated with specific flowers, times, and gods.
Metre Variations
Anthologies are classified by the metre used — Akaval (Asiriyappa), Kali, and Pari are the three main verse forms found across the eight collections.
Compiler Attribution
Compilers are known for some anthologies and unknown for others (see the table).
Numbering Logic
Poems in each anthology have specific line-count ranges; for instance, Kurunthogai has poems of 4–8 lines, while Aingurunuru has poems of 3–6 lines.
Historical Value
These poems provide evidence of ancient Tamil society — trade, kingship, agriculture, and customs — without religious or didactic intent.
Natrinai (நற்றிணை)
Poems: 400 · Lines per Poem: 9–12 · Theme: Aham · Compiler: Unknown (patron: Pannadu Thantha Pandiyan Maran Vazhuthi)
Kurunthogai (குறுந்தொகை)
Poems: 401 · Lines per Poem: 4–8 · Theme: Aham · Compiler: Poorikko
Aingurunuru (ஐங்குறுநூறு)
Poems: 500 · Lines per Poem: 3–6 · Theme: Aham · Compiler: Pulathurai Mutriya Koodalur Kizhar
Pathitruppathu (பதிற்றுப்பத்து)
Poems: 80 (20 lost) · Lines per Poem: 10+ · Theme: Puram · Compiler: Unknown (10 poets)
Paripatal (பரிபாடல்)
Poems: 22 (70 originally) · Lines per Poem: Varies · Theme: Mixed · Compiler: Unknown
Kalithogai (கலித்தொகை)
Poems: 150 · Lines per Poem: Varies (Kali metre) · Theme: Aham · Compiler: Nallanthuvanaar
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Idioms and Proverbs — General Tamil — Eligibility-cum-Scoring Test · 12 cards
Palamozhi (பழமொழி)
are complete sentences expressing universal truths or moral lessons. They stand alone and convey wisdom applicable across situations. Example: "கற்றது கைமண் அளவு, கல்லாதது உலகளவு" (What we learned is a handful; what we haven't is the world).
Marabu Thodar (மரபுத் தொடர்)
are fixed phrases that must be used as a unit—changing any word destroys the meaning. Example: "கைமேல் பலன்" (immediate result) cannot be altered to "காலமேல் பலன்."
Literal vs Figurative meaning
is the core distinction. "தலையில் மிளகாய் அரைக்கிறான்" literally means grinding chilli on the head but figuratively means troubling someone severely.
Contextual appropriateness
is frequently tested. The same situation may have multiple related proverbs, but only one fits the exact context given.
Regional variations
exist—some proverbs have slightly different wordings across Tamil Nadu, but TNPSC follows standard literary Tamil forms.
Classification by theme
Proverbs are often grouped under themes like hard work, education, fate, patience, and human nature—recognizing themes helps in elimination during exams.
ஆழம் தெரியாமல் காலை விடாதே
Don't act without knowing the depth (consequences)
அகத்தின் அழகு முகத்தில் தெரியும்
Inner beauty reflects on the face
ஊருடன் ஒத்து வாழ்
Live in harmony with society
கற்றது கைமண் அளவு
Learning is endless; humility in knowledge
தன் வினை தன்னைச் சுடும்
One's own deeds will affect oneself
பசி வந்திடப் பத்தும் பறந்து போம்
Hunger destroys all virtues
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Tamil Epics and Bhakti Literature — General Tamil — Eligibility-cum-Scoring Test · 12 cards
Aimperumkappiyangal (Five Great Epics)
Silappathikaram, Manimekalai, Seevaka Chinthamani, Valayapathi, and Kundalakesi—representing Hindu, Buddhist, and Jain traditions.
Twin Epics
Silappathikaram and Manimekalai are called "Irattai Kappiyangal" because Manimekalai continues the story from Silappathikaram.
Religious Classification
Silappathikaram (Hindu/Jain blend), Manimekalai (Buddhist), Seevaka Chinthamani (Jain), Valayapathi (Jain), Kundalakesi (Buddhist)—the last two are mostly lost.
Bhakti Movement
A devotional revolution (6th–9th century CE) that democratized worship, rejected caste barriers, and produced the Nayanmars (Shaiva saints) and Azhwars (Vaishnava saints).
Panniru Thirumurai
Twelve sacred books of Shaivism, with Thevaram (books 1–7) and Thiruvasagam (book 8) being most important for exams.
Nalayira Divya Prabandham
4000 verses by 12 Azhwars, considered the "Tamil Veda" of Vaishnavism, compiled by Nathamuni.
Kannagi as Symbol
Silappathikaram's heroine Kannagi represents chastity (karpu) and justice—her burning of Madurai is iconic in Tamil culture.
Silappathikaram
Author: Ilango Adigal · Religion: Hindu-Jain · Key Feature: First Tamil epic; Kannagi's story; set in Puhar, Madurai, Vanji
Manimekalai
Author: Seethalai Sathanar · Religion: Buddhist · Key Feature: Sequel to Silappathikaram; heroine becomes Buddhist nun
Seevaka Chinthamani
Author: Tiruthakka Thevar · Religion: Jain · Key Feature: First epic in viruthapa metre; 13 chapters; hero Sivakan
Valayapathi
Author: Unknown · Religion: Jain · Key Feature: Mostly lost; only fragments survive
Kundalakesi
Author: Nathakuthanar · Religion: Buddhist · Key Feature: Mostly lost; heroine debates and defeats Jain monks
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Cheevaka Chinthamani — General Tamil — Eligibility-cum-Scoring Test · 12 cards
Author — Tirutakkadevar
A Jain ascetic who composed this epic to propagate Jain values through an engaging narrative. He is also called Sattanar in some traditions but should not be confused with the author of Manimekalai.
Period of Composition
Generally dated to the 9th–10th century CE, during the later Pallava or early Chola period when Jainism flourished in Tamil Nadu.
Structure
The epic contains 13 chapters called ilambakangal (இலம்பகங்கள்) with 3,145 verses. Each ilambakam is named after a significant event or character.
Metre — Viruttam
Cheevaka Chinthamani pioneered the extensive use of viruttam (a four-line verse form with specific syllabic patterns), making it the model for later mahakavyas.
Central Theme
The life of Civakan — his royal birth, separation from parents, acquisition of 64 arts, marriages to eight women, worldly triumphs, and final renunciation leading to Jain moksha.
Jain Philosophy
The epic emphasises karma, non-violence (ahimsa), detachment from worldly pleasures, and the soul's journey towards liberation. Civakan's renunciation in the final chapter illustrates Jain ideals.
Classification
One of the Aimperumkappiyangal (five great epics) along with Silappathikaram, Manimekalai, Valayapathi, and Kundalakesi.
Literary Influence
Kambar acknowledged Cheevaka Chinthamani as a model for his Ramayanam, especially in the use of viruttam and narrative techniques.
Tamil Name
சீவக சிந்தாமணி
Author
Tirutakkadevar (திருத்தக்கதேவர்)
Religion
Jainism
Period
9th–10th century CE
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Porul (Meaning) — General Tamil — Eligibility-cum-Scoring Test · 12 cards
Porul Adhikaram in Tholkappiyam
The third section of Tholkappiyam, containing 9 iyals (chapters) — the largest of the three adhikarams, with Agattinai Iyal and Purattinai Iyal as core chapters.
Aham (அகம்) — Inner Theme
Poetry dealing with love, personal emotions, and domestic life. The hero (Talaivan), heroine (Talaivi), and their confidantes are central characters. Never names specific individuals — uses universal, symbolic treatment.
Puram (புறம்) — Outer Theme
Poetry dealing with war, valour, kingship, philanthropy, and public life. Names real kings, battles, and places. Celebrates heroism, generosity, and righteous conduct.
Tinai (திணை) — Landscape-Theme System
Each landscape (nilam) carries specific associations — season, time, flower, animal, deity, and emotional theme. Tholkappiyam gives seven tinais each for Aham and Puram; five of the Aham tinais are the landscape tinais.
Mudal Porul (முதற்பொருள்)
The primary elements — land (nilam) and time (pozhudu). These form the setting of the poem.
Karu Porul (கருப்பொருள்)
The characteristic elements — flora, fauna, deity, occupation, food, drum, and musical mode (pann) associated with each landscape.
Uri Porul (உரிப்பொருள்)
The essential theme — the specific love situation or emotional state appropriate to each tinai.
Meypadu (மெய்ப்பாடு)
The eight emotional expressions — Nakai (laughter), Azhukai (weeping), Ilivaral (disgust), Marutkkai (wonder), Accham (fear), Perumitham (pride), Vekuli (anger), Uvagai (joy).
Kurinji (குறிஞ்சி)
Land (Nilam): Mountain · Flower: Kurinji flower · Deity: Murugan · Season: Cool season (Koothir) · Time: Night (Yaamam) · Uri Porul (Theme): Union of lovers (Punartal)
Mullai (முல்லை)
Land (Nilam): Forest · Flower: Jasmine · Deity: Thirumal (Vishnu) · Season: Rainy season (Kaar) · Time: Evening (Maalai) · Uri Porul (Theme): Patient waiting (Iruthal)
Marutham (மருதம்)
Land (Nilam): Farmland · Flower: Marutham flower · Deity: Indra · Season: All seasons · Time: Dawn (Vaikarai) · Uri Porul (Theme): Sulking after infidelity (Oodal)
Neytal (நெய்தல்)
Land (Nilam): Seashore · Flower: Blue water lily · Deity: Varunan · Season: All seasons · Time: Dusk (Erpaddu) · Uri Porul (Theme): Pining in separation (Irankal)
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Tamil Novelists — General Tamil — Eligibility-cum-Scoring Test · 10 cards
Mayavaram Vedanayagam Pillai
wrote Prathapa Mudaliar Charithram (1879), considered the first Tamil novel, establishing prose fiction as a literary form.
Kalki Krishnamurthy
mastered the historical novel genre, blending Chola and Pallava history with romantic storytelling and nationalist sentiment.
Akilan
focused on rural Tamil Nadu life, earning recognition for portraying village society, agricultural communities, and social reform themes.
Jayakanthan
pioneered urban realism in Tamil fiction, addressing taboo subjects like prostitution, caste discrimination, and psychological complexity.
Sahitya Akademi Award
recognition marks canonical status—Akilan won for Vengaiyin Mainthan (1963) and Jayakanthan for Sila Nerangalil Sila Manithargal (1972).
Serialized publication
in magazines like Kalki, Ananda Vikatan, and Kumudam shaped how Tamil novels reached readers and influenced their episodic structure.
Mu. Varadarajan
Period: 1912–1974 · Major Works: Agal Vilakku · Themes/Style: Academic-literary bridge, Tamil literature scholarship
Na. Parthasarathy
Period: 1932–1987 · Major Works: Kurinjimalar, Ponvilanghu · Themes/Style: Historical and romantic fiction
Sujatha
Period: 1935–2008 · Major Works: En Iniya Iyanthira, Kaṟpanai Kadhal · Themes/Style: Science fiction, technology, modern urban themes
Sandilyan
Period: 1910–1987 · Major Works: Kadal Pura, Yavana Rani · Themes/Style: Historical adventure fiction
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Pathupattu — General Tamil — Eligibility-cum-Scoring Test · 8 cards
Definition
Pathupattu comprises ten long poems (idylls) composed by different poets, each praising a king or chieftain, describing battles, landscapes, or romantic themes.
Tiṇai Classification
Each poem is classified under a specific tiṇai — Kurinji (mountain), Mullai (forest), Marutham (agricultural), Neythal (coastal), or Palai (desert/wasteland) — determining its mood and setting.
Patronage System
The poems reflect the tradition of "pulavars" (poets) receiving patronage from kings, offering these elaborate compositions as tributes in exchange for royal gifts.
Aham and Puram Themes
Six poems belong to Puram (external/heroic themes like war and kingship) and four belong to Aham (internal/love themes).
Historical Value
These poems serve as primary sources for Sangam-era history, mentioning real kings, battles, trade, and social customs.
Longest Sangam Work
Maduraikkanci is the longest poem in entire Sangam literature with 782 lines, providing a detailed portrait of Madurai city.
Commentary Tradition
Naccinarkkiniyar wrote the most authoritative commentary on Pathupattu, which helps in understanding obscure references.
10
Poem Name: Malaipadukadam · Author: Perunkundrur Perunkausikanar · Lines: 583 · King/Theme: Nannan (hill chieftain) · Tiṇai: Mullai
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Singular, Plural and Gender — General Tamil — Eligibility-cum-Scoring Test · 10 cards
ஒருமை (Singular)
refers to one person, animal, or thing. பன்மை (Plural) refers to more than one. Tamil uses specific suffixes to mark plurality.
திணை Classification
All nouns belong to either உயர்திணை (humans and deities—rational) or அஃறிணை (animals, objects, plants—irrational). This is the primary division before gender.
பால் (Gender) in உயர்திணை
Divided into ஆண்பால் (masculine singular), பெண்பால் (feminine singular), and பலர்பால் (plural for both genders combined).
பால் in அஃறிணை
Divided into ஒன்றன்பால் (singular—one animal/thing) and பலவின்பால் (plural—many animals/things).
Common plural suffixes
கள், மார், ஆர், அர் are added to singular nouns. The choice depends on the திணை and the noun's ending.
Pronoun agreement
Pronouns like அவன் (he), அவள் (she), அவர் (he/she respectful), அவர்கள் (they—rational), அது (it), அவை (they—irrational) must match the noun's திணை and பால்.
Verb agreement
Tamil verbs carry suffixes that agree with the subject's பால். For example: வந்தான் (he came), வந்தாள் (she came), வந்தார்கள் (they came), வந்தது (it came), வந்தன (they—irrational—came).
Respectful forms
For elders and respected persons, பன்மை forms are used even for a single person (அவர் வந்தார் for one respected person).
உயர்திணை
பால்: ஆண்பால் (masc. sing.) · Example Noun: மாணவன் · Example Pronoun: அவன் · Verb Suffix: -ஆன்
அஃறிணை
பால்: ஒன்றன்பால் (irrat. sing.) · Example Noun: மரம் · Example Pronoun: அது · Verb Suffix: -அது / -தது
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Bhakti Literature — General Tamil — Eligibility-cum-Scoring Test · 12 cards
Two Streams of Bhakti
Tamil Bhakti divides into Shaivam (worship of Shiva) represented by Nayanmars and Vaishnavism (worship of Vishnu) represented by Alwars. Both emerged simultaneously but developed separate canonical texts.
Nayanmars (நாயன்மார்கள்)
63 Shaiva saints whose lives are recorded in Periyapuranam by Sekkizhar. The term means "leaders" or "masters" and includes saints from all castes—Thiruneelakandar was a potter, Nandanar was from a marginalized community.
Alwars (ஆழ்வார்கள்)
12 Vaishnava saints whose name means "those immersed in God." They composed 4,000 verses collectively called Nalayira Divya Prabandham. Andal is the only female Alwar.
Panniru Thirumurai
The twelve-volume Shaiva Tamil canon. Thevaram forms volumes 1-7, Thiruvasagam is volume 8. Compiled systematically under Chola royal patronage.
Temple-Centric Worship
Bhakti saints established the tradition of glorifying specific temples (பாடல் பெற்ற தலங்கள்). Thevaram praises 274 Shiva temples; Divya Prabandham glorifies 108 Vishnu temples (Divya Desams).
Democratization of Religion
Bhakti broke caste barriers—saints came from various social backgrounds, and their Tamil hymns allowed common people to participate in worship without knowing Sanskrit.
Musical Tradition
Thevaram hymns are set to specific panns (Tamil musical modes). The tradition of Odhuvars singing Thevaram in temples continues today.
Thevaram
Composed by Moovar (the Three): Thirugnanasambandar, Thirunavukkarasar (Appar), Sundarar
Thirugnanasambandar
Child prodigy; fed divine milk by Goddess Uma; composed Thevaram at age 3; 4,158 verses
Thirunavukkarasar (Appar)
Born Marulneekkiyar; as a Jain monk named Dharmasenar; converted to Shaivism; 313 surviving hymns (tradition says he composed 4,900); called "Appar" (father) by Sambandar
Sundarar
Called "Vanthondan" (harsh devotee); composed 1,026 verses; his life inspired Periyapuranam
Thevaram Compiler
Nambiyandar Nambi compiled under Rajaraja Chola I (985-1014 CE)
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Yappu (Prosody) — General Tamil — Eligibility-cum-Scoring Test · 12 cards
Asai (அசை)
The smallest metrical unit, a syllable. Two types: Nér (நேர்) — a kuril or nedil, alone or followed by a mei; Nirai (நிரை) — long syllable beginning with two kurils or a kuril+nedil combination.
Seer (சீர்)
A metrical foot formed by combining asais. The four basic seers are: Thémaa (நேர்+நேர்), Pulimaa (நிரை+நேர்), Koovilam (நேர்+நிரை), Karuvilam (நிரை+நிரை).
Adi (அடி)
A metrical line made of seers. Classified by number of seers: Kuraladi (2 seers), Sintadi (3 seers), Alavadi (4 seers), Nedaladi (5 seers), Kazhinediladi (6+ seers).
Thodai (தொடை)
Rhyme or ornamentation connecting words/lines. Types include Monai (initial letter rhyme), Edhugai (second letter rhyme), Iyaibu (end rhyme), and Muranilai (contrasting words).
Pa (பா)
Complete verse forms. The four major types are Venpa, Aasiriyappa, Kalippa, and Vanchippa — each with distinct seer patterns and ending rules.
Kuril and Nedil
Kuril (குறில்) is a short vowel (அ, இ, உ, எ, ஒ); Nedil (நெடில்) is a long vowel (ஆ, ஈ, ஊ, ஏ, ஐ, ஓ, ஔ). This distinction is fundamental to identifying asai types.
Otrasai and Irasai
Seers can be one-asai (Otrasai seers) or two-asai (Irasai seers). Advanced forms have three or four asais.
Nér asai
Definition: Kuril or nedil, alone or followed by a mei · Example/Note: த, தன்
Nirai asai
Definition: Two kurils or kuril+nedil together · Example/Note: தன, தனா
Thémaa
Definition: நேர் + நேர் seer · Example/Note: தன்மை
Pulimaa
Definition: நிரை + நேர் seer · Example/Note: கவலை
Koovilam
Definition: நேர் + நிரை seer · Example/Note: தாமரை
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Modern Tamil Literature — General Tamil — Eligibility-cum-Scoring Test · 12 cards
Renaissance Period (1850-1920)
Printing press arrival transformed Tamil literature; journals like Swadesamitran and India promoted new writing; prose became dominant alongside poetry.
Nationalist Literature
Subramania Bharathi pioneered patriotic poetry; literature became a weapon against colonial rule; themes of freedom, unity, and courage dominated this era.
Dravidian Movement Literature
Bharathidasan and others used poetry for social reform; anti-caste, rationalist, and Tamil pride themes emerged strongly after 1920s.
Novel as New Form
Tamil novel emerged in late 19th century; historical novels by Kalki popularized the genre; social novels addressed contemporary problems.
Short Story Revolution
Pudumaipithan introduced psychological depth; modernist techniques entered Tamil prose; individual consciousness replaced collective themes.
Progressive Writers Movement
1930s-50s saw socially committed literature; writers addressed poverty, exploitation, and class struggle directly.
Contemporary Trends
Post-independence literature explores existentialism, feminism, Dalit perspectives; experimental forms in poetry and prose continue evolving.
Ku.Pa. Rajagopalan
Essays and literary criticism
T. Janakiraman
Mogamul, Marappasu - psychological depth
Sundara Ramasamy
Oru Puliyamarathin Kathai - experimental novel
Ashokamitran
Urban middle-class life; Sahitya Akademi Award
La.Sa. Ramamirtham
Apitha - women's perspective
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Short Story and Essay — General Tamil — Eligibility-cum-Scoring Test · 11 cards
Pudumaipithan (1906–1948)
Real name C. Viruthachalam (சி. விருத்தாசலம்). Called the "Maupassant of Tamil literature" for his realistic, psychologically intense short stories. Pioneer of the modern Tamil short story movement.
Rationalist and Reformist Themes
Pudumaipithan attacked superstition, caste discrimination, religious hypocrisy, and women's oppression. His stories challenged conservative Tamil society with sharp social criticism.
Ku.Pa. Rajagopalan (1902–1944)
Full name Kumbakonam P. Rajagopalan. Master of the Tamil essay form called "கட்டுரை கலை" (essay art). Known for philosophical depth, humour, and elegant prose style.
Manikodi Movement (மணிக்கொடி இயக்கம்)
Literary magazine (1933–1939) that brought together progressive Tamil writers including Pudumaipithan. Introduced Western literary techniques and modern themes to Tamil literature.
Contemporary Essayists
Include writers like Thi.Janakiraman (தி.ஜானகிராமன்), Sundara Ramasamy, Ka.Naa. Subramanyam, and Jeyamohan who continued the essay tradition with diverse styles and themes.
Psychological Realism
Pudumaipithan's signature technique of exploring characters' inner conflicts, desires, and moral struggles rather than just external events.
Essay as Art Form
Ku.Pa. elevated essays from mere information-giving to literary art combining philosophy, personal reflection, and aesthetic prose.
Pudumaipithan
Real Name: C. Viruthachalam · Period: 1906–1948 · Known For: Short stories, social criticism
Ku.Pa. Rajagopalan
Real Name: K.P. Rajagopalan · Period: 1902–1944 · Known For: Essays, philosophical prose
Thi.Janakiraman
Real Name: Janakiraman · Period: 1921–1982 · Known For: Essays, novels
Ka.Naa. Subramanyam
Real Name: K.N. Subramanyam · Period: 1912–1988 · Known For: Essays, criticism
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Pathinen Keezhkanakku — General Tamil — Eligibility-cum-Scoring Test · 12 cards
Verse Structure
All Keezhkanakku works are composed in Venba metre, unlike Melkanakku works that use Ahaval. Each poem has at most 4 lines, making them concise and easy to memorize.
Thematic Classification
The 18 works divide into:
Time Period
Post-Sangam era, also called the "Sangam Maruviya Kaalam" — the transitional period between classical Sangam and Bhakti literature.
Religious Influence
These works show increasing influence of Jainism and Buddhism, especially Naladiyar (Jain monks) and Pazhamozhi Nanuru.
Thirukkural Supremacy
Among all eighteen, Thirukkural holds the highest position, called "உலகப் பொதுமறை" (Universal Scripture) and "தமிழ் மறை" (Tamil Veda).
Nanuru Series
Two works contain 400 verses each — Naladiyar and Pazhamozhi Nanuru.
Educational Purpose
Unlike Sangam poetry's artistic expression, Keezhkanakku texts were created for teaching common people about righteous living.
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Work Name: Thinaimozhi Aimbathu · Author: Kannan Chendhanar · Verses: 50 · Theme: Love themes
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Work Name: Aindhinai Aimbathu · Author: Maran Poraiyanar · Verses: 50 · Theme: Five landscapes
12
Work Name: Aindhinai Ezhupathu · Author: Moovadhiyar · Verses: 70 · Theme: Five landscapes
13
Work Name: Pazhamozhi Nanuru · Author: Mundrurai Arayanar · Verses: 400 · Theme: Proverbs
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Work Name: Sirupanchamoolam · Author: Kariyasan · Verses: 100 · Theme: Five medicinal roots (moral)
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Reading Comprehension and Vocabulary — General Tamil — Eligibility-cum-Scoring Test · 12 cards
Unseen Passage (பத்தியறிதல் வினாக்கள்)
A prose passage is given; questions test literal comprehension, inference, title selection, and author's purpose.
Synonyms (ஒத்த சொல்)
Words with the same or nearly same meaning. Example: அழகு = எழில், சீர்.
Antonyms (எதிர்ச்சொல்)
Words with opposite meaning. Example: இருள் ↔ ஒளி, வெற்றி ↔ தோல்வி.
Idioms (மரபுத்தொடர்)
Fixed expressions where meaning differs from literal words. Example: "கண்ணில் படுதல்" = to be noticed, not literally falling in the eye.
Proverbs (பழமொழி)
Traditional sayings conveying wisdom. Example: "ஆழம் தெரியாமல் காலை விடாதே" = Don't step without knowing the depth.
Singular and Plural (ஒருமை-பன்மை)
Grammatical number. Example: மரம் (singular) → மரங்கள் (plural).
Gender (பால்)
Tamil has five genders — ஆண்பால் (masculine), பெண்பால் (feminine), பலர்பால் (rational plural), ஒன்றன்பால்/பலவின்பால் (neuter singular/plural).
Context Clues
In comprehension, unknown word meanings can often be inferred from surrounding sentences — a key exam skill.
Synonym
Tamil Term: ஒத்த சொல் / இணைச்சொல் · What to Remember: Same meaning, different word
Antonym
Tamil Term: எதிர்ச்சொல் · What to Remember: Opposite meaning
Idiom
Tamil Term: மரபுத்தொடர் · What to Remember: Figurative meaning, fixed form
Proverb
Tamil Term: பழமொழி · What to Remember: Traditional wisdom, complete sentence
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Ani (Figures of Speech) — General Tamil — Eligibility-cum-Scoring Test · 12 cards
Ani = Poetic Ornament
Any literary device that enhances meaning, emotion, or aesthetic appeal of a composition.
Uvamai (உவமை)
Comparison using explicit markers like "போல்", "போன்ற", "நிகர்" — the Tamil equivalent of simile.
Uruvaham (உருவகம்)
Direct identification without comparison word — the Tamil equivalent of metaphor. Object A is Object B.
Tharkurippu Etra Ani (தற்குறிப்பேற்ற அணி)
The poet attributes human emotions to nature or inanimate objects — similar to pathetic fallacy.
Edhugai, Mohanai, Iyaibu
Sound-based devices (alliteration patterns) that also function as ani when used for effect.
Tholkappiyam to Thandi Alangaram
Tholkappiyam introduces basic concepts; Thandi Alangaram (by Thandiyacharya) expands to 35+ ani types.
Uvamai Ani
Tamil: உவமை அணி · Definition: Simile — explicit comparison · Key Marker/Example: போல், போன்ற, நேர், நிகர்
Uruvaham
Tamil: உருவகம் · Definition: Metaphor — A is B directly · Key Marker/Example: No comparison word
Tharkurippu Etra Ani
Tamil: தற்குறிப்பேற்ற அணி · Definition: Attributing poet's feeling to nature · Key Marker/Example: Moon weeps, flowers laugh
Uvamaithohanai Ani
Tamil: உவமைத்தொகை அணி · Definition: Compressed simile — comparison word dropped · Key Marker/Example: மலர்க்கை (flower-hand)
Edhir Nilai Ani
Tamil: எதிர்நிலை அணி · Definition: Contrast/Antithesis · Key Marker/Example: Black vs white, rich vs poor
Pinvarunilai Ani
Tamil: பின்வருநிலை அணி · Definition: Repetition — a word or meaning used earlier recurs later · Key Marker/Example: Same word or meaning recurs in the verse
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Punarchi (Sandhi) — General Tamil — Eligibility-cum-Scoring Test · 10 cards
Punarchi defined
When a நிலைமொழி (first word) and வருமொழி (second word) combine, the junction point where changes occur is called punarchi. The first word's final letter (ஈறு) and second word's initial letter (முதல்) interact.
Two major classifications
Punarchi divides into இயல்பு புணர்ச்சி (natural joining without change) and விகாரப் புணர்ச்சி (joining with phonetic modification).
Iyalbu Punarchi (இயல்பு புணர்ச்சி)
Words join without any letter being added, removed, or altered. Example: தமிழ் + மொழி = தமிழ்மொழி.
Vikara Punarchi (விகாரப் புணர்ச்சி)
Phonetic changes occur during joining. Three types of changes — தோன்றல் (addition), திரிதல் (modification), கெடுதல் (deletion).
Thodarchi Types
Based on what combines — உயிரீற்றுப் புணர்ச்சி (vowel-ending), மெய்யீற்றுப் புணர்ச்சி (consonant-ending), and their combinations with vowel or consonant beginnings.
Vallinam Doubling (வல்லினம் மிகுதல்)
A critical rule where hard consonants (க், ச், த், ப்) double when joining under specific conditions.
Udambadumei (உடம்படுமெய்)
Glide letters ய், வ் that appear between a vowel-ending word and a vowel-beginning word during punarchi.
தோன்றல்
What Happens: A new letter appears · Example: மா + பழம் = மாம்பழம் (ம் appears)
திரிதல்
What Happens: A letter changes to another · Example: பொன் + குடம் = பொற்குடம் (ன் → ற்)
கெடுதல்
What Happens: A letter is deleted · Example: மரம் + வேர் = மரவேர் (ம் deleted)
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History — General Studies (SSLC standard) · 12 cards
Anniversary calculation
Birth anniversary = Current Year − Birth Year. Death anniversary = Current Year − Death Year. Milestone years are typically 25th, 50th, 75th, 100th, 125th, or 150th.
National commemorations
Government of India officially celebrates certain years—like "Azadi Ka Amrit Mahotsav" for 75 years of Independence (2022) or Gandhi's 150th birth anniversary (2019).
Tamil Nadu specific dates
Birth anniversaries of Periyar, Anna, Kamaraj, Bharathi, and Bharathidasan are state-level celebrations with official holidays or events.
UNESCO and international recognitions
Some Indian historical events or figures receive international commemoration—know when Indian contributions are globally recognised.
Jayanti vs Punyatithi
Jayanti refers to birth anniversary; Punyatithi (or death anniversary) marks the day of passing.
Recent constitutional milestones
Republic Day (26 January 1950), Constitution adoption (26 November 1949)—their 75th anniversaries fall in 2025 and 2024 respectively.
Mahatma Gandhi
Birth: 2 October 1869 · Death: 30 January 1948 · Significance: Father of the Nation
Jawaharlal Nehru
Birth: 14 November 1889 · Death: 27 May 1964 · Significance: First PM, Children's Day
Sardar Patel
Birth: 31 October 1875 · Death: 15 December 1950 · Significance: National Unity Day
Subhas Chandra Bose
Birth: 23 January 1897 · Death: 18 August 1945 · Significance: Parakram Diwas
B.R. Ambedkar
Birth: 14 April 1891 · Death: 6 December 1956 · Significance: Constitution architect
Bhagat Singh
Birth: 28 September 1907 · Death: 23 March 1931 · Significance: Shaheed Diwas
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Nature of Indian Economy — General Studies (SSLC standard) · 12 cards
Mixed Economy
India follows a mixed economic system where both government and private enterprises coexist. The state controls key sectors (defence, railways, atomic energy) while private players dominate consumer goods, IT, and services.
Three Sectors of Economy
The economy is divided into Primary (agriculture, mining, fishing), Secondary (manufacturing, construction), and Tertiary (services like banking, transport, IT). This classification is based on the nature of economic activity.
Structural Transformation
At Independence, agriculture contributed over 50% of GDP. Today, the service sector contributes approximately 55%, industry (including manufacturing) around 25-27%, and agriculture only about 15-18%. This shift from primary to tertiary is a key exam point.
Largest Employer vs Largest GDP Contributor
Agriculture employs about 42-45% of the workforce but contributes only 15-18% to GDP. Services contribute the most to GDP but employ fewer people proportionally. This mismatch is called disguised unemployment in agriculture.
Public Sector Undertakings (PSUs)
Government-owned enterprises like BHEL, ONGC, and Indian Railways operate in strategic sectors. Maharatna, Navratna, and Miniratna are categories based on their financial autonomy.
Liberalization (1991)
The LPG reforms (Liberalization, Privatization, Globalization) opened India's economy to foreign investment, reduced licensing requirements, and encouraged private sector growth.
Formal vs Informal Sector
The formal sector (organized, registered businesses) provides job security and benefits. The informal sector (unregistered, small enterprises) employs the majority but lacks social security.
Type of Economy
Mixed Economy (public + private sectors)
Architect of Planning
P.C. Mahalanobis (Second Five Year Plan model)
1991 Reforms
LPG — Liberalization, Privatization, Globalization
Finance Minister (1991)
Dr. Manmohan Singh introduced economic reforms
Primary Sector
Agriculture, forestry, fishing, mining
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Early Resistance and 1857 — General Studies (SSLC standard) · 12 cards
Doctrine of Lapse
Policy of Lord Dalhousie that annexed princely states without natural heirs—Satara (1848), Jhansi (1853), Nagpur (1854)—creating widespread resentment among Indian rulers.
Greased Cartridges Issue
The immediate trigger—new Enfield rifle cartridges rumoured to be greased with cow and pig fat, offending both Hindu and Muslim sepoys who had to bite them before loading.
Mangal Pandey's Revolt (29 March 1857)
The first spark at Barrackpore when Sepoy Mangal Pandey attacked British officers; he was hanged on 8 April 1857.
Meerut Outbreak (10 May 1857)
Sepoys refused cartridges, were court-martialled; their comrades revolted and marched to Delhi, capturing it on 11 May 1857.
Bahadur Shah Zafar as Symbol
The last Mughal emperor was declared leader of the revolt, giving it legitimacy and a unifying figurehead, though he had no real military power.
Civilian Participation
Not just a military mutiny—peasants, artisans, and zamindars joined against land revenue policies and economic exploitation.
Limited Geographical Spread
Revolt concentrated in North and Central India (Delhi, Awadh, Kanpur, Jhansi, Bihar); South India, Punjab, and Bengal remained largely unaffected.
Lack of Coordination
Different centres fought independently without unified command or common strategy, contributing to British success in suppressing the revolt.
Date of Outbreak
10 May 1857 at Meerut
End of Revolt
June 1858 (Gwalior fell; Rani Lakshmibai died 17 June 1858)
Governor-General during Revolt
Lord Canning (1856-1862)
Delhi recaptured by British
September 1857
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Earth and Universe — General Studies (SSLC standard) · 12 cards
The Solar System
consists of the Sun, 8 planets, dwarf planets (like Pluto), moons, asteroids, comets, and meteoroids. The Sun contains 99.8% of the solar system's mass and is the source of all light and heat.
Planet Classification
Inner/Terrestrial planets (Mercury, Venus, Earth, Mars) are rocky and small. Outer/Jovian planets (Jupiter, Saturn, Uranus, Neptune) are gaseous giants. Remember the order: "My Very Educated Mother Just Showed Us Neptune."
Earth's Movements
Rotation (spinning on axis, 24 hours, causes day-night) and Revolution (orbiting Sun, 365¼ days, causes seasons). Earth's axis is tilted at 23½° from the perpendicular to the orbital plane (66½° to the plane itself), which is why we have seasons.
Latitude
lines run east-west but measure north-south position (0° to 90° N/S). The Equator is 0°, Tropic of Cancer is 23½°N, Tropic of Capricorn is 23½°S, Arctic Circle is 66½°N, Antarctic Circle is 66½°S.
Longitude
lines run north-south but measure east-west position (0° to 180° E/W). The Prime Meridian (0°) passes through Greenwich, London. The International Date Line is at 180°.
Time Zones
Earth rotates 360° in 24 hours = 15° per hour. Moving east, time increases; moving west, time decreases. India follows IST at 82½°E longitude (Mirzapur, UP), which is 5 hours 30 minutes ahead of GMT.
Atmosphere
is the gaseous envelope surrounding Earth, held by gravity. It protects life by blocking harmful radiation, maintains temperature, and enables weather.
Atmospheric Composition
Nitrogen (78%), Oxygen (21%), Argon (0.93%), Carbon dioxide (0.04%), and trace gases. Water vapour varies by location and is crucial for weather.
Distance from Earth to Sun
150 million km (1 Astronomical Unit)
Distance from Earth to Moon
384,400 km
Earth's equatorial diameter
12,756 km
Earth's rotation period
23 hours 56 minutes 4 seconds (sidereal day)
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Indus Valley Civilization — General Studies (SSLC standard) · 12 cards
Bronze Age Civilization
The IVC belonged to the Bronze Age; people used copper and bronze tools, not iron.
Geographical Spread
Extended from Sutkagen Dor (Balochistan) in the west to Alamgirpur (UP) in the east, and from Manda (Jammu) in the north to Daimabad (Maharashtra) in the south.
Two Major Cities
Harappa (on River Ravi, Punjab, Pakistan) and Mohenjo-daro (on River Indus, Sindh, Pakistan) were the twin capitals with populations estimated at 35,000–40,000 each.
Grid Pattern Town Planning
Cities were divided into a raised Citadel (west) for public buildings and a Lower Town (east) for residential areas, built on a grid system with roads cutting at right angles.
Advanced Drainage System
The most distinctive feature—covered drains ran along streets, with individual house drains connecting to main channels; inspection manholes were provided.
Standardized Weights and Measures
Weights followed a binary system (1, 2, 4, 8, 16...) made of chert stone; a standard unit was approximately 13.63 grams.
Undeciphered Script
The Harappan script (about 400 signs) remains undeciphered; written right to left; found mainly on seals.
Peaceful Civilization
No evidence of large-scale warfare; no depictions of battles; weapons were mostly for hunting.
Period
Mature Phase: 2600–1900 BCE
Discovery
Harappa discovered by Daya Ram Sahni (1921); Mohenjo-daro by R.D. Banerji (1922)
Harappa
On River Ravi; granaries, working platforms, cemetery
Mohenjo-daro
"Mound of the Dead"; Great Bath, Granary, College, Assembly Hall
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Constitution of India — General Studies (SSLC standard) · 12 cards
Constituent Assembly
Formed in 1946 under the Cabinet Mission Plan; had 389 members initially, reduced to 299 after Partition; Dr. Rajendra Prasad was the permanent Chairman.
Drafting Committee
Seven-member committee chaired by Dr. B.R. Ambedkar (called the "Father of the Indian Constitution"); responsible for preparing the draft Constitution.
Preamble
The introductory statement declaring India as a Sovereign, Socialist, Secular, Democratic Republic—amended once by the 42nd Amendment (1976) to add "Socialist" and "Secular."
Borrowed Features
India's Constitution draws from multiple sources—British parliamentary system, American fundamental rights, Irish directive principles, Canadian federal structure with a strong centre.
Lengthiest Written Constitution
Originally had 395 Articles, 8 Schedules, and 22 Parts; currently has 470+ Articles and 12 Schedules—the longest written constitution in the world.
Federal with Unitary Bias
Division of powers between Centre and States, but Centre has overriding authority during emergencies—hence called "quasi-federal."
Rigid and Flexible
Some provisions need special majority (2/3rd) and state ratification; others can be amended by simple majority—a blend of rigidity and flexibility.
Single Citizenship
Unlike the USA, India has only one citizenship—no separate state citizenship.
Constitution adopted
26 November 1949 (National Law Day)
Constitution enforced
26 January 1950 (Republic Day)
Time taken to draft
2 years, 11 months, 18 days
First session of Constituent Assembly
9 December 1946
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General Science — General Studies (SSLC standard) · 8 cards
Matter exists in three states
solid, liquid, and gas — with distinct properties of shape, volume, and compressibility. Plasma is the fourth state found in stars and fluorescent tubes.
Newton's three laws of motion
explain all mechanical phenomena: inertia (objects resist change), F = ma (force produces acceleration), and action-reaction pairs.
Energy can neither be created nor destroyed
, only transformed from one form to another — this Law of Conservation of Energy governs all physical and chemical processes.
Atoms combine through ionic or covalent bonding
ionic involves electron transfer (NaCl), covalent involves electron sharing (H₂O).
Photosynthesis is the foundation of life on Earth
plants convert CO₂ and water into glucose and oxygen using sunlight and chlorophyll.
Human body systems work in coordination
circulatory (blood transport), respiratory (gas exchange), digestive (nutrient absorption), nervous (signal transmission), and excretory (waste removal).
pH scale measures acidity and alkalinity
below 7 is acidic, exactly 7 is neutral, above 7 is basic. Human blood maintains pH around 7.4.
Heredity operates through DNA
genes carry traits from parents to offspring, with dominant and recessive allele patterns determining expression.
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Physics — General Studies (SSLC standard) · 12 cards
SI Units form the foundation
The International System has seven base units—metre (length), kilogram (mass), second (time), ampere (current), kelvin (temperature), mole (amount), candela (luminous intensity). All derived units come from these.
Scalar vs Vector quantities
Scalars have only magnitude (speed, mass, time, temperature). Vectors have both magnitude and direction (velocity, acceleration, force, displacement).
Newton's Three Laws govern motion
First law defines inertia, second law gives F = ma, third law states action-reaction pairs are equal and opposite.
Heat is energy in transit
Heat flows from higher to lower temperature. Temperature measures degree of hotness; heat measures total thermal energy transferred.
Light travels fastest in vacuum
3 × 10⁸ m/s. It slows in denser media, causing refraction. Mirrors reflect; lenses refract.
Sound needs a medium
Cannot travel through vacuum. Travels fastest in solids, slowest in gases. Speed in air at 20°C is approximately 343 m/s.
Electric current is charge flow
Measured in amperes. Ohm's law relates voltage, current, and resistance. Power determines energy consumption.
Work-Energy relationship
Work done equals force times displacement in force's direction. Energy is capacity to do work; both measured in joules.
Speed
Speed = Distance ÷ Time
Velocity
Velocity = Displacement ÷ Time (vector)
Acceleration
a = (v − u) ÷ t
Force
F = m × a (Newton's second law)
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History of Tamil Nadu — General Studies (SSLC standard) · 12 cards
Sangam Age represents the classical Tamil period
three Tamil kingdoms (Cheras, Cholas, Pandyas) coexisted with flourishing literature and Roman trade through ports like Puhar, Korkai, and Muziris.
Pallavas introduced Dravidian temple architecture
the shift from rock-cut temples (Mahabalipuram) to structural temples (Kanchipuram) marks their lasting contribution.
Cholas perfected centralised administration
their elaborate revenue system, village self-government (Uttaramerur inscriptions), and naval supremacy set them apart from all other South Indian dynasties.
Pandyas were the oldest Tamil dynasty
mentioned in Megasthenes' accounts and Ashoka's edicts; they revived powerfully in the 13th century under Jatavarman Sundara Pandya.
Vijayanagar Empire acted as a Hindu bulwark
after the Delhi Sultanate's southern expansion, Vijayanagar rulers patronised Tamil temples and appointed Nayak governors.
Nayaks were originally Vijayanagar governors
they became independent after Talikota (1565) and are remembered for Meenakshi Temple's expansion and the Thirumalai Nayak Mahal.
Maritime trade defined Tamil prosperity
from Sangam-era Roman gold coins to Chola naval expeditions to Southeast Asia, the sea was central to Tamil Nadu's economy.
Sangam Cheras
Period: 300 BCE – 300 CE · Capital(s): Vanji (Karur) · Famous Rulers: Senguttuvan · Key Contribution: Patirruppattu (5th decade); Silappadikaram connection
Sangam Cholas
Period: 300 BCE – 300 CE · Capital(s): Uraiyur, Puhar · Famous Rulers: Karikala · Key Contribution: Kallanai dam on Kaveri
Sangam Pandyas
Period: 300 BCE – 300 CE · Capital(s): Madurai · Famous Rulers: Nedunchezhiyan · Key Contribution: Sangam academy patronage
Pallavas
Period: 275 – 897 CE · Capital(s): Kanchipuram · Famous Rulers: Mahendravarman I, Narasimhavarman I, Nandivarman II · Key Contribution: Rock-cut and structural temples; Pallava Grantha script
Medieval Cholas
Period: 848 – 1279 CE · Capital(s): Thanjavur, Gangaikondacholapuram · Famous Rulers: Vijayalaya, Rajaraja I, Rajendra I · Key Contribution: Brihadeeswarar Temple; naval expeditions; Uttaramerur inscription
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Current Events — General Studies (SSLC standard) · 12 cards
Government Schemes
Central schemes (launched by Union Government) vs State schemes (launched by Tamil Nadu Government). Know the scheme name, ministry, target beneficiaries, and key features.
Constitutional Amendments
Recent amendments that alter fundamental aspects—new reservations, delimitation changes, or structural reforms to governance.
International Relations
India's bilateral agreements, membership in global groupings (G20, BRICS, SCO, QUAD), and summits hosted by India.
Awards and Honours
Bharat Ratna, Padma Awards, National Sports Awards (Khel Ratna, Arjuna), Nobel Prizes, and Tamil Nadu state awards.
Appointments
Key constitutional posts—President, Vice-President, Chief Justice of India, Governors, Chief Ministers, and heads of important institutions (RBI, ISRO, DRDO).
Defence and Security
New military exercises, indigenous defence equipment (Make in India), border developments, and strategic partnerships.
Science and Technology
Space missions (ISRO achievements), nuclear facilities, supercomputers, and breakthrough research from Indian institutions.
Sports Events
Olympics, Asian Games, Commonwealth Games, Cricket World Cups, and achievements of Indian and Tamil Nadu sportspersons.
President of India
Current incumbent, election year, previous office held
Chief Minister of TN
Current CM, key welfare schemes announced
Union Budget
Fiscal deficit target, major allocations, new taxes
Census/Survey
Latest data on population, literacy, sex ratio
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Political Science — General Studies (SSLC standard) · 11 cards
Election Commission of India (ECI)
conducts all elections to Parliament, State Legislatures, and offices of President and Vice-President. The Chief Election Commissioner can only be removed through impeachment (like a Supreme Court judge).
Model Code of Conduct (MCC)
comes into force from the date elections are announced. It is not statutory law but convention-based, yet ECI enforces it strictly to ensure free and fair polls.
Constitutional Amendments
require special majority in Parliament — majority of total membership AND two-thirds of members present and voting. Some amendments also need ratification by half the state legislatures.
One Nation One Election
is a proposed reform to synchronize Lok Sabha and State Assembly elections, currently under active discussion following the High-Level Committee report (2024).
Delimitation
is the process of redrawing constituency boundaries based on census data. The current freeze on delimitation (based on 1971 census for seat allocation) was extended until 2026 by the 84th Amendment.
EWS Reservation
under the 103rd Amendment (2019) provides 10% reservation in education and government jobs for Economically Weaker Sections among forward castes. Supreme Court upheld its validity in 2022.
Women's Reservation
The 106th Amendment (Nari Shakti Vandan Adhiniyam, 2023) reserves one-third seats for women in Lok Sabha and State Legislative Assemblies, to be implemented after delimitation following the next census.
103rd Amendment
Year: 2019 · Key Provision: 10% EWS reservation in education and jobs
104th Amendment
Year: 2020 · Key Provision: Extended SC/ST reservation in legislatures by 10 years (to 2030)
105th Amendment
Year: 2021 · Key Provision: Restored state power to identify OBCs (after Maratha reservation case)
106th Amendment
Year: 2023 · Key Provision: 33% women's reservation in Lok Sabha and State Assemblies
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Planning and NITI Aayog — General Studies (SSLC standard) · 12 cards
Planned Economy
India adopted a mixed economy model with centralized planning after independence, inspired by the Soviet model but allowing private sector participation.
Planning Commission (1950–2014)
An extra-constitutional body established by a Cabinet resolution on 15 March 1950; it formulated Five-Year Plans and allocated resources to states.
Five-Year Plans
India completed 12 Five-Year Plans from 1951 to 2017; each plan had specific priorities—agriculture, industry, self-reliance, poverty alleviation, or inclusive growth.
NITI Aayog (2015–present)
Replaced Planning Commission on 1 January 2015; full form is National Institution for Transforming India; emphasizes "cooperative federalism" and "competitive federalism."
Shift from Allocation to Facilitation
Planning Commission allocated funds to states in a top-down manner; NITI Aayog acts as a think tank providing policy advice without fund allocation powers.
Role of Finance Commission
After NITI Aayog's creation, the Finance Commission became the primary body for fiscal transfers to states, increasing state autonomy.
Sustainable Development Goals (SDGs)
NITI Aayog monitors India's progress on the UN's 17 SDGs and publishes the SDG India Index ranking states.
Planning Commission established
15 March 1950
First Five-Year Plan period
1951–1956
Father of Indian Planning
M. Visvesvaraya (conceptual); Jawaharlal Nehru (execution)
First Chairman of Planning Commission
Jawaharlal Nehru (Prime Minister is ex-officio Chairman)
Planning Commission replaced
1 January 2015
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Gandhian Era — General Studies (SSLC standard) · 11 cards
Satyagraha Philosophy
Gandhi's method of non-violent resistance—civil disobedience to unjust laws while accepting punishment. First tested in Champaran (1917), Kheda (1918), and Ahmedabad Mill Strike (1918).
Non-Cooperation Movement (1920–22)
First mass movement under Gandhi. Indians boycotted British institutions, titles, courts, schools, and foreign cloth. Suspended after Chauri Chaura incident (February 1922) where a violent mob killed 22 policemen.
Civil Disobedience Movement (1930–34)
Launched with Dandi March (March 12 to April 6, 1930)—Gandhi walked 385 km to make salt, breaking the Salt Law. Marked by mass arrests, women's participation, and peasant involvement.
Quit India Movement (1942)
Most intense struggle demanding immediate British withdrawal. "Do or Die" call. Leaders arrested on August 8–9, 1942. Movement went underground with parallel governments in some areas.
Gandhi-Irwin Pact (1931)
Agreement ending first phase of Civil Disobedience. Congress suspended movement; British released political prisoners and allowed salt-making for personal use.
August Offer (1940) and Cripps Mission (1942)
British proposals that failed to satisfy Congress demand for complete independence, leading to Quit India resolution.
Role of Women
Sarojini Naidu, Kasturba Gandhi, Aruna Asaf Ali became prominent. Women participated in picketing, salt-making, and underground activities.
Parallel Movements
Khilafat Movement (1919–24) merged with Non-Cooperation, bringing Hindu-Muslim unity under Gandhi's leadership.
Non-Cooperation
Year: 1920–22 · Trigger/Cause: Jallianwala Bagh (1919), Rowlatt Act, Khilafat issue · Outcome: Suspended after Chauri Chaura; showed mass mobilization potential
Civil Disobedience
Year: 1930–34 · Trigger/Cause: Purna Swaraj resolution (Dec 1929), Salt Tax · Outcome: Gandhi-Irwin Pact (1931); Round Table Conferences
Quit India
Year: 1942 · Trigger/Cause: Failure of Cripps Mission; WWII situation · Outcome: Crushed but shook British confidence; hastened independence
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Geography of India — General Studies (SSLC standard) · 12 cards
India's Location
Lies entirely in the Northern Hemisphere, extending from 8°4'N to 37°6'N latitude and 68°7'E to 97°25'E longitude. The Tropic of Cancer (23°30'N) passes through eight states.
Six Physiographic Divisions
The Northern Mountains, Northern Plains, Peninsular Plateau, Coastal Plains, Thar Desert, and Islands form India's physical framework.
Himalayan System
Young fold mountains divided into three parallel ranges—Greater Himalayas (Himadri), Lesser Himalayas (Himachal), and Outer Himalayas (Shiwaliks).
Monsoon Mechanism
India's climate is dominated by the monsoon system—southwest monsoon (June–September) brings 75% of annual rainfall; northeast monsoon (October–December) is crucial for Tamil Nadu.
River Systems
Two major systems—Himalayan rivers (perennial, snow-fed) and Peninsular rivers (seasonal, rain-fed). Most Peninsular rivers flow eastward except Narmada and Tapti.
Soil Classification
Indian Council of Agricultural Research (ICAR) classifies Indian soils into eight major types based on formation, colour, and composition.
Natural Vegetation Zones
Determined by rainfall and temperature—tropical rainforests, deciduous forests, thorny bushes, mountain vegetation, and mangroves.
Mineral Distribution
Minerals concentrated in three belts—Chotanagpur plateau (iron, coal), Southwestern plateau (iron, manganese), and Northwestern region (petroleum, natural gas).
Area & Boundaries
Total area: 32.87 lakh sq km; Land boundary: 15,200 km; Coastline: 7,516 km
Highest Peak
K2 (Godwin Austen) at 8,611 m is highest in India; Kanchenjunga (8,586 m) is highest within Indian territory
Longest River
Ganga (2,525 km); Longest Peninsular river: Godavari (1,465 km)
Largest State
By area: Rajasthan; By population: Uttar Pradesh
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Vedic and Mauryan Period — General Studies (SSLC standard) · 12 cards
Vedic Period Division
Early/Rig Vedic Period (1500–1000 BCE) was pastoral and tribal; Later Vedic Period (1000–600 BCE) saw settled agriculture, varna system rigidity, and elaborate rituals.
Four Vedas Hierarchy
Rig Veda (oldest, hymns to gods), Sama Veda (melodies for rituals), Yajur Veda (sacrificial formulas), Atharva Veda (spells, medicine, daily life).
Vedic Literature Layers
Samhitas (hymns) → Brahmanas (ritual explanations) → Aranyakas (forest treatises) → Upanishads (philosophical discussions).
Heterodox Challenge
By 6th century BCE, Kshatriya-led movements—Buddhism and Jainism—rejected Vedic rituals and caste hierarchy, emphasizing individual salvation.
Buddhism's Core
Four Noble Truths explain suffering; Eightfold Path provides the solution; Nirvana is the goal; no soul (Anatta), impermanence (Anicca).
Jainism's Core
Tri-ratna (Right Faith, Right Knowledge, Right Conduct); Ahimsa (non-violence) is supreme; soul exists and can attain liberation (Kaivalya).
Mauryan Centralization
Chandragupta Maurya (321 BCE) founded India's first empire; Kautilya's Arthashastra guided administration; Ashoka (268–232 BCE) propagated Dhamma after Kalinga War.
Ashoka's Dhamma
Non-violence, tolerance, respect for elders, welfare of all beings—a practical ethical code, not a religion; spread through rock and pillar edicts.
Rig Vedic Society
Sapta Sindhu region (Punjab); tribal unit called Jana; chief was Rajan; cattle wealth (Godhana); no rigid caste
Later Vedic Changes
Expansion to Ganga-Yamuna Doab; king became powerful with rituals like Rajasuya, Ashvamedha; four varnas crystallized
Important Upanishads
Brihadaranyaka, Chandogya, Katha, Mundaka, Isha—contain concepts of Atman, Brahman, Karma, Moksha
Buddha's Life
Born 563 BCE at Lumbini; enlightenment at Bodh Gaya under Peepal tree; first sermon at Sarnath (Dharmachakrapravartana); death at Kushinagar (Mahaparinirvana)
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Fundamental Rights, Duties and DPSP — General Studies (SSLC standard) · 12 cards
Justiciable vs Non-Justiciable
Fundamental Rights can be enforced through courts (Article 32 and 226), while DPSP cannot be directly enforced but guide legislation and policy.
Article 12 defines "State"
Includes Government of India, Parliament, State Governments, State Legislatures, local authorities, and other authorities under government control. Private bodies are generally not "State."
Article 13 ensures supremacy
Any law inconsistent with Fundamental Rights is void to the extent of inconsistency. This is the basis of judicial review.
Reasonable Restrictions
Fundamental Rights are not absolute. The Constitution allows the state to impose reasonable restrictions in the interest of sovereignty, public order, morality, etc.
DPSP as conscience of Constitution
Though not enforceable, DPSP represents the socio-economic goals of the Constitution—socialism, welfare state, equitable distribution.
Fundamental Duties are moral obligations
They are non-justiciable but can be promoted through legislation. The 86th Amendment (2002) added the 11th duty regarding education of children.
Harmony doctrine
Courts have held that Fundamental Rights and DPSP are complementary, not conflicting. In case of conflict, amendments have often been made to give primacy to DPSP.
14
Right to Equality—equality before law and equal protection of laws
15
Prohibition of discrimination on grounds of religion, race, caste, sex, place of birth
16
Equality of opportunity in public employment
17
Abolition of Untouchability
18
Abolition of Titles (except military and academic)
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Chemistry — General Studies (SSLC standard) · 12 cards
Element vs Compound vs Mixture
An element contains only one type of atom (e.g., iron, oxygen). A compound contains two or more elements chemically combined in fixed ratio (e.g., water H₂O). A mixture has components physically combined with no fixed ratio (e.g., air, salt water).
Atom and Molecule
Atom is the smallest particle of an element that retains its identity. Molecule is the smallest particle of an element or compound that can exist independently (e.g., O₂, H₂O).
Periodic Table Basics
Elements arranged by increasing atomic number. Rows are periods (7 total), columns are groups (18 total). Metals on left, non-metals on right, metalloids along the zigzag line.
Acids
Substances that release H⁺ ions in water, taste sour, turn blue litmus red, react with metals to produce hydrogen gas. Examples: HCl (hydrochloric acid), H₂SO₄ (sulphuric acid), CH₃COOH (acetic acid).
Bases
Substances that release OH⁻ ions in water, taste bitter, feel soapy, turn red litmus blue. Examples: NaOH (sodium hydroxide), Ca(OH)₂ (calcium hydroxide), NH₄OH (ammonium hydroxide).
Salts
Formed by neutralization of acid and base. Contain a metal cation and an acid anion. Examples: NaCl (common salt), CaSO₄ (calcium sulphate), NaHCO₃ (baking soda).
pH Scale
Measures acidity/basicity from 0 to 14. pH 7 is neutral. Below 7 is acidic, above 7 is basic. Stomach acid has pH ~2, blood has pH ~7.4, soap solution has pH ~9-10.
Chemical Reaction
Process where reactants transform into products with new chemical properties. Evidence includes colour change, gas evolution, precipitate formation, temperature change.
Water formula
H₂O — 2 hydrogen atoms + 1 oxygen atom
Common salt
NaCl — sodium chloride
Baking soda
NaHCO₃ — sodium bicarbonate
Washing soda
Na₂CO₃ — sodium carbonate
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Socio-Political Movements — General Studies (SSLC standard) · 12 cards
Non-Brahmin Movement
The umbrella term for efforts by non-Brahmin communities to gain social equality, educational access, and political representation against the dominant Brahmin elite in colonial Madras Presidency.
Justice Party (1916)
The first political organisation of non-Brahmins, founded to secure communal representation and oppose Congress dominance; it introduced reservation policies when in power.
Self-Respect Movement (1925)
A radical social reform movement founded by Periyar E.V. Ramasamy that rejected caste, rituals, religious superstition, and advocated rationalism, women's rights, and dignity for all.
Dravidar Kazhagam (1944)
The non-political organisation formed when Periyar renamed the Justice Party, focusing purely on social reform and Dravidian identity.
Dravida Munnetra Kazhagam (1949)
Political party founded by C.N. Annadurai after splitting from Dravidar Kazhagam, marking the entry of the Dravidian movement into electoral politics.
Communal G.O. (1927)
A landmark government order issued under the unaffiliated P. Subbarayan ministry (not a Justice Party government; the Justice government had issued the first communal G.O. in 1921) that introduced caste-based reservation in government jobs—a precursor to modern reservation policy.
Vaikom Satyagraha (1924-25)
Movement in Travancore for the right of lower castes and 'untouchables' to use the public roads around the Vaikom temple, where Periyar earned the title "Vaikom Veerar" for his leadership in the struggle for Dalit rights.
Anti-Hindi Agitation
Resistance against imposition of Hindi, first in 1937-40 and again in 1965, which became a defining cause for Dravidian parties.
South Indian Liberal Federation (Justice Party)
Year: 1916 · Founder(s): T.M. Nair, P. Thyagaraja Chetty, C. Natesa Mudaliar · Key Feature: First non-Brahmin political party
Non-Brahmin Manifesto
Year: 1916 · Founder(s): Justice Party leaders · Key Feature: Document demanding fair representation
Justice Party Newspaper
Year: 1917 · Founder(s): Justice Party · Key Feature: English daily "Justice" started
Self-Respect Movement
Year: 1925 · Founder(s): E.V. Ramasamy (Periyar) · Key Feature: Rationalist, anti-caste social movement
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Geographical Landmarks — General Studies (SSLC standard) · 12 cards
District Formation Authority
State governments create new districts through executive orders; no constitutional amendment is required. The State Legislative Assembly need not pass a law for district creation.
State/UT Reorganization
Creating a new state or Union Territory requires a law of Parliament under Article 3 (passed by simple majority; Article 4(2) says such a law is not a Constitutional Amendment). Parliament has the sole authority; state legislature opinion is sought but not binding.
Tamil Nadu District Evolution
TN originally had 13 districts at formation (1956). As of 2024, Tamil Nadu has 38 districts. The most recent additions came in 2019 and 2020.
Jammu & Kashmir Reorganisation (2019)
The state was bifurcated into two Union Territories — J&K (with legislature) and Ladakh (without legislature) — effective 31 October 2019.
Telangana Formation (2014)
India's 29th state, carved from Andhra Pradesh on 2 June 2014. Hyderabad served as joint capital for 10 years.
City/Place Renaming
Several cities have been officially renamed — Allahabad to Prayagraj (2018), Faizabad to Ayodhya (2018), Gurgaon to Gurugram (2016).
Article 370 Abrogation
Special status of J&K was revoked on 5 August 2019, leading to its reorganization into Union Territories.
Total States in India
28 (after J&K reorganization)
Total Districts in India
766 (approximately; varies with new creations)
Total Districts in Tamil Nadu
38 (as of 2024)
Newest State of India
Telangana (2 June 2014)
Newest Union Territories
Dadra and Nagar Haveli and Daman and Diu (26 January 2020); J&K and Ladakh (31 October 2019)
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Banking and Finance — General Studies (SSLC standard) · 12 cards
Reserve Bank of India (RBI)
is India's central bank, established on 1 April 1935 under the RBI Act 1934. It was nationalised in 1949. Headquarters: Mumbai. Current Governor heads the institution.
Functions of RBI
Issues currency (except coins), acts as banker to government and banks, controls credit and money supply, manages foreign exchange reserves, regulates and supervises banks, and maintains financial stability.
Commercial Banks
accept deposits from the public and provide loans. They operate on the fractional reserve system—keeping a portion as reserves while lending the rest.
Scheduled Banks
are listed in the Second Schedule of the RBI Act and must maintain Cash Reserve Ratio (CRR) with RBI. Non-scheduled banks are not in this list.
Types of Commercial Banks
Public Sector Banks (government owns majority—SBI, PNB), Private Sector Banks (HDFC, ICICI), Foreign Banks (Citibank, HSBC), Regional Rural Banks (serve rural areas), and Small Finance Banks.
GST (Goods and Services Tax)
is a single indirect tax replacing multiple central and state taxes. Implemented from 1 July 2017 under the 101st Constitutional Amendment. "One Nation, One Tax" principle.
Fiscal Policy
refers to government's use of taxation and expenditure to influence the economy. Union Budget presented annually outlines fiscal policy. Finance Ministry handles fiscal policy, not RBI.
Monetary Policy
is RBI's domain—controlling money supply and interest rates through tools like Repo Rate, Reverse Repo Rate, CRR, and SLR.
RBI Establishment
1 April 1935, nationalised 1 January 1949
RBI Headquarters
Mumbai (originally Kolkata until 1937)
RBI Act
1934
Banking Regulation Act
1949
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Tamil Nadu Freedom Fighters — General Studies (SSLC standard) · 12 cards
Swadeshi Movement in Tamil Nadu (1905-1911)
The partition of Bengal sparked intense nationalist activity in Tamil Nadu. VOC, Bharathi, and Subramania Siva formed the core leadership that promoted indigenous enterprise and boycott of British goods.
Indigenous Shipping Challenge
VOC's Swadeshi Steam Navigation Company was a direct economic challenge to British monopoly—the first Indian-owned shipping company to compete with British lines.
Literature as Resistance
Bharathi revolutionised Tamil literature, using poetry as a weapon for nationalism, social reform, and women's liberation. His works spread nationalist ideas among the masses.
Extremist Nationalism in Madras Presidency
Unlike moderate Congress leaders, Tamil Nadu's freedom fighters like VOC and Subramania Siva aligned with Tilak's extremist faction, advocating direct action.
Gandhian Phase Leadership
Rajaji and Kamaraj became prominent during the Gandhian era; Rajaji led the Vedaranyam salt satyagraha (1930) in the Civil Disobedience Movement, and Kamaraj was jailed for his Quit India work (1942), a movement Rajaji opposed.
Social Reform Integration
Tamil freedom fighters uniquely combined political independence with social reform—opposing caste discrimination, promoting women's education, and championing Tamil language.
Sacrifice and Imprisonment
Many leaders endured harsh prison sentences, with VOC famously subjected to manual labour as a convict, becoming a symbol of colonial oppression.
V.O. Chidambaram Pillai
Birth-Death: 1872-1936 · Title/Epithet: Kappalottiya Tamizhan (Tamil Helmsman) · Major Contribution: Founded Swadeshi Steam Navigation Company (1906)
Subramania Bharathi
Birth-Death: 1882-1921 · Title/Epithet: Mahakavi (Great Poet) · Major Contribution: Nationalist poetry, edited India and Vijaya newspapers
Subramania Siva
Birth-Death: 1884-1925 · Title/Epithet: Orator of the Swadeshi Movement · Major Contribution: Tirunelveli Coral Mill strike, powerful speeches
K. Kamaraj
Birth-Death: 1903-1975 · Title/Epithet: Kingmaker, Black Gandhi, Karma Veerar · Major Contribution: Chief Minister of TN, Congress President, Kamaraj Plan
C. Rajagopalachari
Birth-Death: 1878-1972 · Title/Epithet: Rajaji · Major Contribution: Last Governor-General of India, Vedaranyam Salt March
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Geography — General Studies (SSLC standard) · 12 cards
Solar System Structure
Sun at centre, eight planets (Mercury to Neptune), Earth is the 5th largest planet and 3rd from the Sun. Moon is Earth's only natural satellite.
Latitude and Longitude
Latitudes are horizontal lines measuring north-south position (0° at Equator, 90° at poles). Longitudes are vertical lines measuring east-west position (0° at Prime Meridian, 180° at International Date Line). India lies between 8°4'N to 37°6'N latitude and 68°7'E to 97°25'E longitude.
Earth's Movements
Rotation (24 hours, causes day-night) and Revolution (365¼ days, causes seasons). Earth's axis is tilted at 23½°.
Atmosphere Layers
Troposphere (weather occurs here), Stratosphere (contains ozone layer), Mesosphere, Thermosphere, Exosphere — in order from Earth's surface.
India's Physical Divisions
Himalayas (north), Northern Plains (Indo-Gangetic), Peninsular Plateau (Deccan), Coastal Plains (Eastern and Western), Islands (Andaman-Nicobar, Lakshadweep).
Monsoon Mechanism
South-West Monsoon (June–September, brings 75% of India's rainfall) and North-East Monsoon (October–December, crucial for Tamil Nadu).
Tamil Nadu's Physiography
Western Ghats on the west, Eastern Ghats scattered in north, Cauvery delta in the east, coastal plains along Bay of Bengal.
River Systems
Himalayan rivers are perennial (snow-fed); Peninsular rivers are rain-fed and seasonal.
Ganga
Origin: Gangotri Glacier · Drains into: Bay of Bengal
Yamuna
Origin: Yamunotri · Drains into: Joins Ganga at Prayagraj
Brahmaputra
Origin: Mansarovar (Tibet) · Drains into: Bay of Bengal
Godavari
Origin: Nashik (Maharashtra) · Drains into: Bay of Bengal
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Geography of Tamil Nadu — General Studies (SSLC standard) · 12 cards
Administrative Divisions
Tamil Nadu has 38 districts (as of 2020, after bifurcation of Villupuram and Vellore). Chennai is the capital and largest city. The state is divided into revenue divisions, taluks and revenue villages for administration.
Physical Regions
The state has five natural divisions — Northern Coastal Plains, Coromandel Coast, Western Ghats (Nilgiris, Anamalais, Palani Hills), Eastern Ghats (Javadi, Kalrayan, Shevaroy Hills), and the Central Plains (Cauvery Delta).
River Systems
Tamil Nadu rivers are mostly east-flowing and rain-fed. The Cauvery is the largest and most important, followed by Palar, Pennar, Vaigai, Thamiraparani and Vellar. Most rivers are non-perennial except during monsoon.
Climate Pattern
Tamil Nadu receives rainfall mainly from the Northeast Monsoon (October–December), unlike most of India which depends on the Southwest Monsoon. Annual rainfall averages 900–1000 mm.
Agricultural Zones
The Cauvery Delta (Thanjavur-Tiruvarur-Nagapattinam) is the "Rice Bowl of Tamil Nadu". Western districts grow plantation crops; southern districts specialise in cotton and millets.
Industrial Corridors
Chennai-Kancheepuram-Tiruvallur forms the automobile hub. Coimbatore is the textile capital. Tuticorin-Thoothukudi is the salt and chemical industry centre. Salem is known for steel.
Coastal Significance
Tamil Nadu has the third longest coastline in India (1,076 km), supporting fishing, ports and marine industries.
Total Districts
38 districts (2020)
Total Area
1,30,058 sq km (10th largest state)
Coastline Length
1,076 km (3rd longest in India)
Largest District (Area)
Dindigul
Smallest District (Area)
Chennai
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Medieval India — General Studies (SSLC standard) · 12 cards
Delhi Sultanate (1206–1526)
comprised five dynasties ruling from Delhi: Slave (Mamluk), Khalji, Tughlaq, Sayyid, and Lodi—ending with Ibrahim Lodi's defeat at the First Battle of Panipat.
Mughal Empire (1526–1707)
was founded by Babur and reached its zenith under Akbar, Shah Jahan, and Aurangzeb; known for centralised administration (Mansabdari system) and architectural grandeur.
Iqta System
was the Sultanate's land revenue arrangement where military commanders received land grants in lieu of salary, forming the administrative backbone.
Mansabdari System
was the Mughal military-administrative hierarchy where nobles held ranks (mansabs) determining their pay and the number of soldiers they maintained.
Bhakti Movement
emphasised personal devotion to God, rejected caste distinctions, and promoted vernacular languages—spreading across India from the 7th century onwards but peaking in medieval times.
Sufi Movement
represented Islamic mysticism focusing on love of God, tolerance, and spiritual music (sama); Sufi saints established khanqahs (hospices) and attracted followers across religions.
Din-i-Ilahi
was Akbar's syncretic religious experiment (1582) combining elements of various faiths—it remained limited to the court and did not survive him.
Jaziya
was a tax on non-Muslims; abolished by Akbar, reimposed by Aurangzeb.
Slave (Mamluk)
Period: 1206–1290 · Founder: Qutbuddin Aibak · Key Rulers: Iltutmish, Razia Sultana, Balban
Khalji
Period: 1290–1320 · Founder: Jalaluddin Khalji · Key Rulers: Alauddin Khalji
Tughlaq
Period: 1320–1414 · Founder: Ghiyasuddin Tughlaq · Key Rulers: Muhammad bin Tughlaq, Firoz Shah Tughlaq
Sayyid
Period: 1414–1451 · Founder: Khizr Khan · Key Rulers: Weak rulers; called themselves "deputies" of Timur
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Union and State Government — General Studies (SSLC standard) · 12 cards
Parliamentary System
India follows the Westminster model — the Executive is responsible to the Legislature. The Prime Minister and Council of Ministers remain in office only as long as they enjoy majority support in Lok Sabha.
Bicameral vs Unicameral
Parliament and six states have two Houses (bicameral). Tamil Nadu has a unicameral legislature (only Legislative Assembly). The Rajya Sabha represents states; Lok Sabha represents the people.
Nominal vs Real Executive
The President and Governor are nominal (constitutional) heads. Real executive power lies with the Prime Minister and Chief Minister respectively, who head the Council of Ministers.
Integrated Judiciary
Unlike the USA, India has a single unified judicial system. The Supreme Court is the apex court, followed by High Courts and subordinate courts. High Courts have jurisdiction over entire states.
Federal with Unitary Bias
The Constitution distributes powers between Centre and States through three lists (Union, State, Concurrent), but grants the Centre overriding powers during emergencies.
Collective Responsibility
The Council of Ministers is collectively responsible to the Lower House. If the government loses a vote of confidence, the entire ministry resigns.
Independence of Judiciary
Judges are appointed through a collegium system, have security of tenure, and can be removed only through impeachment — ensuring independence from executive influence.
Lok Sabha
Maximum 550 members (530 states + 20 UTs); the 2 nominated Anglo-Indian seats ended in January 2020
Rajya Sabha
Maximum 250 members (238 elected + 12 nominated by President)
Lok Sabha term
5 years (can be dissolved earlier)
Rajya Sabha term
6 years (1/3 retire every 2 years — permanent house)
President's term
5 years; eligible for re-election
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Botany — General Studies (SSLC standard) · 12 cards
Five-Kingdom Classification
Plants belong to Kingdom Plantae, distinguished by cell walls made of cellulose, chlorophyll for photosynthesis, and autotrophic nutrition.
Plant Kingdom Divisions
Thallophyta (algae), Bryophyta (mosses—no vascular tissue), Pteridophyta (ferns—vascular but no seeds), Gymnosperms (naked seeds—pine, cycas), Angiosperms (enclosed seeds—flowering plants).
Angiosperms
Divided into Monocots (one cotyledon, parallel veins, fibrous roots—rice, wheat, maize) and Dicots (two cotyledons, reticulate veins, tap root—mango, neem, beans).
Photosynthesis Equation
6CO₂ + 6H₂O + Light energy → C₆H₁₂O₆ + 6O₂. Occurs in chloroplasts. Chlorophyll absorbs light; stomata allow gas exchange.
Plant Hormones
Auxins (cell elongation, tropisms), Gibberellins (stem growth, seed germination), Cytokinins (cell division), Abscisic acid (dormancy, stomatal closure), Ethylene (fruit ripening).
Tropisms
Plant movements in response to stimuli—phototropism (light), geotropism (gravity), hydrotropism (water), thigmotropism (touch).
Transpiration
Loss of water vapour through stomata. Creates transpiration pull for water uptake. Guard cells control stomatal opening.
Economic Botany
Plants providing food (cereals, pulses), fibre (cotton, jute), oil (groundnut, coconut), beverages (tea, coffee), medicine (neem, tulsi), timber (teak, rosewood).
Photosynthesis site
Chloroplast (grana and stroma)
Pigment responsible
Chlorophyll-a (primary), Chlorophyll-b, carotenoids
Light reaction
Occurs in grana; produces ATP and NADPH; releases O₂
Dark reaction
Occurs in stroma; Calvin cycle; fixes CO₂ into glucose
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Administration of Tamil Nadu — General Studies (SSLC standard) · 12 cards
Governor
Constitutional head of the state, appointed by the President of India. Gives assent to bills, addresses the first session of the Assembly each year, and can reserve bills for presidential consideration.
Chief Minister and Council of Ministers
Real executive power lies with the CM who is the leader of the majority party. The Council of Ministers advises the Governor and is collectively responsible to the Legislative Assembly.
Tamil Nadu Legislative Assembly
Unicameral legislature with 234 elected members (MLAs). The Speaker presides over sessions. Laws on State List and Concurrent List subjects are passed here.
District Administration
The District Collector (IAS officer) is the chief administrative and revenue officer of the district. Tamil Nadu has 38 districts (as of 2024). Below the district are Revenue Divisions, Taluks, and Revenue Villages.
Panchayati Raj in TN
Three-tier system — Village Panchayat, Panchayat Union (Block level), and District Panchayat. Urban areas have Town Panchayats, Municipalities, and Municipal Corporations.
Tamil Nadu Public Service Commission (TNPSC)
Constitutional body under Article 315-323 that conducts recruitment exams for state civil services. Chairman and members appointed by the Governor.
Secretariat System
The state secretariat at Chennai houses departments headed by Secretaries (IAS officers) who assist Ministers in policy formulation.
Total Districts in TN
38 (Mayiladuthurai formed in 2020 is the newest)
State Capital
Chennai
Legislative Assembly Seats
234
High Court
Madras High Court (Chennai), Bench at Madurai
First Chief Minister
A. Subbarayalu Reddiar (1920, Madras Presidency); O.P. Ramasamy Reddiar was CM at Independence (1947)
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Welfare Schemes — General Studies (SSLC standard) · 12 cards
Direct Benefit Transfer (DBT)
Government subsidies and payments transferred directly to beneficiary bank accounts, reducing leakage and middlemen. Aadhaar linkage is central to this system.
Poverty Line
Planning Commission criteria — currently based on monthly per capita expenditure (rural ₹816, urban ₹1000 as per Tendulkar Committee methodology, 2011–12). BPL identification determines scheme eligibility.
Self-Help Groups (SHGs)
Groups of 10-20 members (mostly women) who pool savings and access credit. Foundation of rural livelihood programmes like DAY-NRLM.
Universal vs Targeted Schemes
Universal schemes cover all citizens, while targeted schemes focus on BPL, SC/ST, or specific occupational groups.
Convergence Approach
Modern schemes integrate multiple benefits — for example, MGNREGA worksites often create assets linked to housing, water conservation, or agriculture schemes.
Jan Dhan-Aadhaar-Mobile (JAM) Trinity
The backbone of welfare delivery in India — bank accounts, biometric identity, and mobile connectivity enable DBT.
MGNREGA
Year: 2005 · Key Feature: 100 days guaranteed wage employment per rural household
PMAY (Gramin)
Year: 2016 · Key Feature: ₹1.20 lakh (plain) / ₹1.30 lakh (hilly) for pucca house
PM-KISAN
Year: 2019 · Key Feature: ₹6,000 per year to farmer families in three instalments
Ayushman Bharat (PM-JAY)
Year: 2018 · Key Feature: ₹5 lakh health cover per family per year
DAY-NRLM
Year: 2011 · Key Feature: Self-employment through SHG-bank linkage
PM Ujjwala Yojana
Year: 2016 · Key Feature: Free LPG connection to BPL women
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Natural Disasters — General Studies (SSLC standard) · 10 cards
Cyclones
are intense low-pressure systems with high-speed winds rotating around a calm centre called the "eye." They form over warm ocean waters (above 27°C) and weaken after landfall. India's east coast, including Tamil Nadu, is more cyclone-prone than the west coast.
Earthquakes
result from sudden release of energy due to tectonic plate movements along fault lines. Intensity is measured on the Richter Scale (magnitude) and Mercalli Scale (damage). India lies on the Indian Plate, making the Himalayan region and Northeast highly vulnerable.
Floods
occur when water overflows onto normally dry land due to heavy rainfall, dam failure, or poor drainage. India experiences riverine floods (Ganga-Brahmaputra basin), flash floods (hilly areas), and urban floods (Chennai 2015).
Tsunami
are giant sea waves caused by underwater earthquakes, volcanic eruptions, or landslides. The 2004 Indian Ocean Tsunami devastated Tamil Nadu's coast, killing about 8,000 people in the state alone.
Disaster Management
is the systematic process of preparing for, responding to, and recovering from disasters. India follows a three-tier system: National (NDMA), State (SDMA), and District (DDMA) level authorities.
Vulnerability
refers to the degree to which a population or region is susceptible to disaster impact. Coastal areas, flood plains, and seismic zones have high vulnerability.
Mitigation
means reducing disaster impact through structural measures (dams, sea walls) and non-structural measures (early warning systems, building codes).
Cyclone
Primary Cause: Warm ocean, low pressure · Most Affected Regions in India: Odisha, Andhra Pradesh, Tamil Nadu, West Bengal
Earthquake
Primary Cause: Tectonic plate movement · Most Affected Regions in India: Himalayan belt, Northeast, Kutch (Gujarat)
Flood
Primary Cause: Heavy rainfall, river overflow · Most Affected Regions in India: Assam, Bihar, UP, West Bengal
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History and Culture of India — General Studies (SSLC standard) · 12 cards
Indus Valley Civilization (c. 2600–1900 BCE)
Urban, bronze-age civilization with planned cities (Harappa, Mohenjo-daro), advanced drainage, no iron, script undeciphered, declined possibly due to climate change or river shifts.
Vedic Period (c. 1500–600 BCE)
Aryans composed the four Vedas; society divided into varnas; Later Vedic period saw emergence of Upanishads, kingdoms (Mahajanapadas), and philosophical debates.
Rise of Buddhism and Jainism (6th century BCE)
Founded by Gautama Buddha and Mahavira respectively; challenged Vedic rituals; spread through royal patronage (Ashoka for Buddhism, Chandragupta Maurya for Jainism).
Mauryan Empire (321–185 BCE)
First pan-Indian empire; Chandragupta founded it, Ashoka expanded and later embraced non-violence; Arthashastra by Kautilya outlines statecraft.
Gupta Empire (c. 320–550 CE)
"Golden Age" of India; advances in science (Aryabhata), literature (Kalidasa), and art; decimal system and concept of zero developed.
Medieval India (c. 712–1707 CE)
Arab invasions, Delhi Sultanate (five dynasties), Mughal Empire (Babur to Aurangzeb); Bhakti and Sufi movements promoted social harmony.
British Rule and Freedom Struggle (1757–1947)
Battle of Plassey began British dominance; 1857 Revolt was first major uprising; INC founded 1885; Gandhian movements led to Independence.
Indian Culture
Unity in diversity—classical dance forms, music (Hindustani & Carnatic), architecture (temple, Indo-Islamic, colonial), festivals, and literary traditions across languages.
Indus Valley
Great Bath at Mohenjo-daro; Lothal had dockyard; Harappans traded with Mesopotamia
Vedic Age
Rigveda is oldest Veda; Gayatri Mantra from Rigveda; Sabha and Samiti were assemblies
Buddhism
Four Noble Truths; Eightfold Path; First Council at Rajagriha after Buddha's death
Jainism
Triratnas—Right Faith, Knowledge, Conduct; 24 Tirthankaras, first was Rishabhadeva
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Modern India and Freedom Struggle — General Studies (SSLC standard) · 12 cards
Dual Government in Bengal (1765)
After the Battle of Buxar, the East India Company got Diwani (revenue collection) rights while the Nawab retained administrative duties—this exploitative system caused the Bengal Famine of 1770.
Doctrine of Lapse
Lord Dalhousie's policy to annex states without natural heirs (Satara, Jhansi, Nagpur)—a major cause of the 1857 Revolt.
1857 Revolt was not a Sepoy Mutiny alone
It involved zamindars, peasants, and rulers who lost power; it began at Meerut on 10 May 1857 and spread across North and Central India.
Moderate Phase (1885–1905)
Early Congress leaders like Dadabhai Naoroji, Gokhale, and Pherozeshah Mehta used petitions, prayers, and constitutional methods; they developed the "Drain of Wealth" theory.
Extremist Phase (1905–1919)
Leaders like Tilak, Lala Lajpat Rai, and Bipin Chandra Pal advocated Swadeshi, boycott, and national education; Tilak declared "Swaraj is my birthright."
Gandhian Mass Movements
Non-Cooperation (1920–22), Civil Disobedience (1930–34), and Quit India (1942) mobilised millions using non-violent resistance (Satyagraha).
Revolutionary Nationalism
Bhagat Singh, Chandrashekhar Azad, and the INA under Subhas Chandra Bose represented the armed resistance stream parallel to Gandhian methods.
Partition and Independence
The Mountbatten Plan (3 June 1947) led to the creation of India and Pakistan; India became independent on 15 August 1947.
Battle of Plassey
Year/Date: 1757 · Significance: British political control over Bengal began
Battle of Buxar
Year/Date: 1764 · Significance: Company became supreme power in North India
Regulating Act
Year/Date: 1773 · Significance: First Parliamentary control over Company
Permanent Settlement
Year/Date: 1793 · Significance: Lord Cornwallis; Zamindari system in Bengal
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Zoology — General Studies (SSLC standard) · 12 cards
Animal Kingdom Classification
Animals are classified into Invertebrates (without backbone—insects, worms, molluscs) and Vertebrates (with backbone—fish, amphibians, reptiles, birds, mammals). Humans belong to class Mammalia.
Cell as Basic Unit
All living organisms are made of cells. Animal cells lack cell walls and chloroplasts (unlike plant cells). Key organelles include nucleus, mitochondria, ribosomes, and cell membrane.
Human Organ Systems
The body has 11 major systems—digestive, circulatory, respiratory, nervous, excretory, skeletal, muscular, endocrine, reproductive, lymphatic, and integumentary (skin).
Blood Composition
Blood contains plasma (55%) and formed elements (45%)—RBCs (carry oxygen), WBCs (fight infection), and platelets (clotting). Human blood groups are A, B, AB, and O based on antigens.
Heart Function
The heart is a four-chambered muscular pump. Blood flow sequence: Body → Right Atrium → Right Ventricle → Lungs → Left Atrium → Left Ventricle → Body.
Digestion Process
Mechanical and chemical breakdown of food. Digestion begins in mouth (saliva contains ptyalin enzyme), continues in stomach (pepsin, HCl), and completes in small intestine (bile, pancreatic juice).
Nervous System Organisation
Central Nervous System (brain + spinal cord) and Peripheral Nervous System (nerves). Neurons are the functional units transmitting electrical impulses.
Nutrition and Deficiency
Balanced diet includes carbohydrates, proteins, fats, vitamins, minerals, and water. Deficiency of specific nutrients causes specific diseases.
Circulatory
Key Organ: Heart · Main Function: Pumps blood throughout body
Respiratory
Key Organ: Lungs · Main Function: Gas exchange (O₂ in, CO₂ out)
Digestive
Key Organ: Small Intestine · Main Function: Maximum nutrient absorption
Excretory
Key Organ: Kidneys · Main Function: Filter blood, form urine
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Contribution of TN to Freedom Struggle — General Studies (SSLC standard) · 9 cards
Polygars (Palaiyakkarars)
were local chieftains who held land grants from Nayak rulers in exchange for military service. They were the first to wage organised warfare against the British East India Company in South India.
The Vellore Mutiny of 1806
was the first large-scale sepoy mutiny against the British, predating the 1857 Revolt by 51 years. It was triggered by interference in religious customs of Indian soldiers.
Vedaranyam Salt March (1930)
was Tamil Nadu's parallel to the Dandi March, led by C. Rajagopalachari (Rajaji), demonstrating that the Civil Disobedience Movement had strong southern participation.
Kattabomman
(Veerapandiya Kattabomman) became the symbol of Tamil resistance, refusing to pay tribute to the British; he was captured and hanged at Kayattar in 1799.
First Polygar War
Year: 1799 · Key Leader(s): Kattabomman · Location: Panchalankurichi · Significance: First armed resistance in TN
Kattabomman's Execution
Year: 16 October 1799 · Key Leader(s): — · Location: Kayattar · Significance: Became martyr and symbol
Second Polygar War
Year: 1800–1805 · Key Leader(s): Marudhu Brothers · Location: Sivaganga · Significance: United Polygar resistance
Vellore Mutiny
Year: 10 July 1806 · Key Leader(s): Sepoys, Tipu's sons · Location: Vellore Fort · Significance: First large-scale sepoy mutiny in India
Vedaranyam Salt March
Year: 30 April 1930 · Key Leader(s): C. Rajagopalachari · Location: Vedaranyam · Significance: TN's Dandi March
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Scientific Knowledge — General Studies (SSLC standard) · 12 cards
ISRO's Launch Vehicles
PSLV (Polar Satellite Launch Vehicle) is the workhorse for remote sensing satellites; GSLV (Geosynchronous Satellite Launch Vehicle) carries heavier communication satellites; LVM3 (formerly GSLV Mk III) is India's heaviest rocket used for Chandrayaan and Gaganyaan missions.
Types of Satellites by Orbit
LEO (Low Earth Orbit) for earth observation; GEO (Geostationary Orbit) for communication; Polar orbit for mapping and weather monitoring.
Chandrayaan Programme
India's lunar exploration series — Chandrayaan-1 (2008) discovered water molecules on Moon; Chandrayaan-2 (2019) had orbiter success but lander crash; Chandrayaan-3 (August 2023) achieved successful soft landing at lunar south pole, making India the fourth country to land on Moon and first at south pole.
Gaganyaan Mission
India's first crewed spaceflight programme targeting to send Indian astronauts (Vyomanauts) to Low Earth Orbit; test flights using humanoid robot Vyommitra planned before human mission.
Aditya-L1 Mission
India's first solar observatory mission launched in September 2023; placed at Lagrange Point L1 to study Sun's corona, solar winds and space weather.
DRDO Achievements
Defence research body developing missiles (Agni, Prithvi, BrahMos), tanks (Arjun), aircraft (Tejas LCA) and advanced systems like anti-satellite weapons (Mission Shakti, 2019).
Digital India Initiatives
Government programmes for digital empowerment — Aadhaar, DigiLocker, UMANG app, CoWIN, Government e-Marketplace (GeM), BharatNet for rural broadband.
Artificial Intelligence and Emerging Tech
National AI Mission (IndiaAI), quantum computing research, 5G rollout in India, semiconductor manufacturing push under India Semiconductor Mission.
Chandrayaan-3
Launched 14 July 2023; landed 23 August 2023 at Shiv Shakti Point; Vikram lander + Pragyan rover
Aditya-L1
Launched 2 September 2023; reached L1 point on 6 January 2024; carries 7 payloads
Gaganyaan
Target: 2025; LVM3 rocket; 3-member crew for 3-day mission in 400 km orbit
PSLV
4-stage rocket; over 55 successful missions; launched 104 satellites in single mission (2017)
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Indian Culture — General Studies (SSLC standard) · 12 cards
Unity in Diversity
Indian culture reflects synthesis of various traditions—Aryan, Dravidian, Islamic, and Western influences blending over millennia while maintaining regional distinctiveness.
Three Temple Architecture Styles
Nagara (North India, curvilinear shikhara), Dravida (South India, pyramidal vimana with gopuram), and Vesara (Deccan, hybrid of both)—dynasty and geography determine style.
Eight Classical Dances
Recognized by Sangeet Natak Akademi—each linked to a specific state and has distinct costume, technique, and themes (mostly devotional).
Two Classical Music Systems
Hindustani (North, influenced by Persian) and Carnatic (South, more structured, emphasis on composition)—both share raga and tala framework but differ in treatment.
Six Schools of Indian Painting
Miniature traditions—Mughal, Rajput, Pahari, Deccan, Mysore, and Tanjore—each with distinctive style, patronage, and themes.
Festival Calendar
Festivals are tied to lunar calendar, harvest cycles, or religious events—same festival may have different names across regions.
Intangible Cultural Heritage
UNESCO recognizes Indian traditions like Yoga, Kumbh Mela, and Ramlila—expect current affairs overlap.
Bharatanatyam
State: Tamil Nadu · Key Feature: Oldest classical form, Natya Shastra based, Tanjore Quartet codified
Kathakali
State: Kerala · Key Feature: Male dancers, elaborate makeup, Ramayana/Mahabharata themes
Kathak
State: Uttar Pradesh · Key Feature: Mughal influence, footwork (tatkar), ghungroos
Odissi
State: Odisha · Key Feature: Temple sculptures of Konark, tribhangi posture
Kuchipudi
State: Andhra Pradesh · Key Feature: Dance-drama tradition, Siddhendra Yogi
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Indian Polity — General Studies (SSLC standard) · 12 cards
Constitution as Supreme Law
India's Constitution, adopted on 26 November 1949 and effective from 26 January 1950, is the longest written constitution in the world. It establishes the framework for governance and guarantees rights to citizens.
Preamble as Identity Card
The Preamble declares India as a Sovereign, Socialist, Secular, Democratic Republic. The words "Socialist" and "Secular" were added by the 42nd Amendment (1976). It outlines justice, liberty, equality, and fraternity as guiding ideals.
Federal Structure with Unitary Bias
India has a federal system with Centre, States, and Local bodies, but the Centre holds more power during emergencies and in residuary matters. This is often called "quasi-federal."
Separation of Powers
The Constitution divides power among Legislature (law-making), Executive (law-implementation), and Judiciary (law-interpretation) at both Union and State levels.
Fundamental Rights are Justiciable
Citizens can approach courts if their Fundamental Rights are violated. These rights are enforceable against the State.
Directive Principles are Non-Justiciable
DPSPs guide the State in policy-making but cannot be enforced through courts. They represent socio-economic democracy.
Fundamental Duties are Moral Obligations
Added by the 42nd Amendment (10 duties; the 11th by the 86th Amendment, 2002), these 11 duties (Article 51A) are not enforceable but remind citizens of their responsibilities.
Amendment Process
The Constitution can be amended under Article 368. Some amendments need simple majority, some need special majority, and some need ratification by half the states.
Constitution adopted
26 November 1949 (Constitution Day)
Constitution came into force
26 January 1950 (Republic Day)
Total Articles originally
395 articles in 22 parts
Current Articles (approx.)
470+ articles in 25 parts
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Elections and Public Services — General Studies (SSLC standard) · 12 cards
Election Commission is a constitutional body
established under Article 324, responsible for superintendence, direction and control of all elections to Parliament, State Legislatures, and offices of President and Vice-President.
Multi-member Commission structure
Originally single-member, the Election Commission now has a Chief Election Commissioner (CEC) and two Election Commissioners, all with equal voting powers.
CEC enjoys security of tenure
The CEC can only be removed through impeachment (same procedure as Supreme Court judge), ensuring independence from executive pressure.
UPSC is the central recruiting agency
established under Article 315, conducting examinations for All India Services (IAS, IPS, IFS) and Central Services.
TNPSC is the state counterpart
for Tamil Nadu, recruiting Group I to Group IV services for the state government under Article 315.
Constitutional protection for PSC members
Chairman and members of UPSC/SPSC cannot be removed except by Presidential order after Supreme Court inquiry, ensuring their independence.
Advisory role of PSCs
Public Service Commissions advise the government on recruitment, promotions, disciplinary matters and service conditions, though the government is not bound by their advice.
Universal Adult Franchise
Every Indian citizen aged 18 years and above has the right to vote without discrimination based on caste, religion, gender or economic status.
Constitutional Article
Election Commission: 324 · UPSC: 315-323 · TNPSC: 315-323
Appointment by
Election Commission: President · UPSC: President · TNPSC: Governor
Tenure
Election Commission: 6 years or 65 years age · UPSC: 6 years or 65 years age · TNPSC: 6 years or 62 years age
Removal
Election Commission: CEC by impeachment; ECs on CEC's recommendation · UPSC: By President after SC inquiry · TNPSC: By President after SC inquiry (Governor can only suspend)
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Indian Economy — General Studies (SSLC standard) · 12 cards
Mixed Economy
India follows a mixed economic system where both public sector (government-owned enterprises) and private sector coexist. The government controls strategic sectors like defence, railways, and atomic energy while private enterprise operates in most other areas.
Three Sectors of Economy
Primary sector (agriculture, mining, fishing), Secondary sector (manufacturing, construction), and Tertiary sector (services like banking, IT, transport). India's GDP is now dominated by the tertiary sector, though agriculture employs the largest workforce.
Economic Planning
Systematic allocation of resources to achieve development goals. India adopted Five-Year Plans from 1951 under the Planning Commission, now replaced by NITI Aayog since 2015.
Gross Domestic Product (GDP)
Total value of all goods and services produced within the country in a year. It measures economic growth and is calculated by the Ministry of Statistics and Programme Implementation.
Inflation
Sustained increase in general price levels, reducing purchasing power. Measured by Consumer Price Index (CPI) for retail inflation and Wholesale Price Index (WPI) for wholesale inflation.
Fiscal Policy
Government's use of taxation and expenditure to influence the economy. Union Budget presented annually outlines fiscal policy.
Monetary Policy
RBI's control over money supply and interest rates to manage inflation and ensure credit availability.
Planning Commission
Established 1950, chaired by Prime Minister, replaced in 2015
NITI Aayog
National Institution for Transforming India, formed 1 January 2015
First Five-Year Plan
1951–1956, focused on agriculture, based on Harrod-Domar model
RBI Establishment
1 April 1935, nationalised in 1949, headquarters in Mumbai
GST Launch Date
1 July 2017, "One Nation One Tax"
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Indian National Movement — General Studies (SSLC standard) · 12 cards
Revolt of 1857
was the first large-scale armed uprising; though it failed, it ended Company rule and transferred power to the British Crown.
Formation of Indian National Congress (1885)
provided an all-India platform; early leaders like Dadabhai Naoroji, Gopal Krishna Gokhale adopted constitutional methods—petitions, prayers, and press campaigns (Moderate Phase).
Partition of Bengal (1905)
by Lord Curzon ignited Swadeshi and Boycott movements; Extremists (Tilak, Lala Lajpat Rai, Bipin Chandra Pal—Lal-Bal-Pal) demanded Swaraj.
Revolutionary Nationalism
saw secret societies and armed actions; Bhagat Singh, Chandrashekhar Azad, Khudiram Bose sacrificed their lives for the cause.
Gandhian Mass Movements
(Non-Cooperation 1920–22, Civil Disobedience 1930–34, Quit India 1942) mobilised millions through non-violent Satyagraha.
Role of Subhas Chandra Bose and INA
internationalised the struggle; "Give me blood, I will give you freedom" galvanised armed resistance from abroad.
Communal developments and Partition
were tragic outcomes; Muslim League's demand led to the creation of Pakistan alongside independent India in 1947.
Tamil Nadu's contribution
includes Polygar rebellions, Vellore Mutiny (1806), and stalwarts like V.O. Chidambaram Pillai, Subramania Bharati, Rajaji, and Kamaraj.
1857
Event / Act: Revolt of 1857 (Sepoy Mutiny) · Significance: First War of Independence; ended East India Company rule
1885
Event / Act: Indian National Congress founded (Bombay) · Significance: A.O. Hume; first national political organisation
1905
Event / Act: Partition of Bengal · Significance: Sparked Swadeshi & Boycott; revoked 1911
1906
Event / Act: Muslim League formed (Dhaka) · Significance: Communal politics begins
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History, Culture, Heritage and Socio-Political Movements of Tamil Nadu — General Studies (SSLC standard) · 12 cards
Sangam Age (300 BCE – 300 CE)
Three Tamil kingdoms—Cheras (Vanji), Cholas (Uraiyur/Puhar), Pandyas (Madurai)—flourished; Sangam literature reflects their society, trade, and culture.
Pallava Dynasty (275–897 CE)
Introduced Dravidian temple architecture; Mamallapuram rock-cut temples (a UNESCO World Heritage Site) and the Kailasanatha temple at Kanchipuram are famous examples.
Chola Empire (848–1279 CE)
Greatest Tamil dynasty known for naval power, administrative efficiency (Ur, Sabha, Nagaram), and Brihadeeswarar Temple at Thanjavur.
Pandya Revival and Vijayanagar-Nayak Rule
Pandyas revived in 13th century; later Vijayanagar governors (Nayaks) ruled Madurai, Thanjavur, and Gingee from 16th century.
Justice Party (1916)
Founded by T.M. Nair, P. Thyagaraja Chetty, and C. Natesa Mudaliar to represent non-Brahmin interests; first to form ministry in Madras Presidency (1920).
Self-Respect Movement (1925)
Started by E.V. Ramasamy Periyar to eradicate caste discrimination, promote rationalism, and empower women and lower castes.
Dravidian Movement
Evolved from Justice Party into Dravidar Kazhagam (1944), then DMK (1949) under C.N. Annadurai, fundamentally reshaping Tamil Nadu politics.
Tamil Nadu's Freedom Struggle Contribution
Polygar Wars, Vellore Mutiny (1806), Vedaranyam Salt March (1930), and leaders like V.O. Chidambaram, Subramania Bharati, and Rajaji.
Sangam Assemblies
Three Sangams held (by tradition) at Then Madurai, Kapatapuram and Madurai; Tholkappiyam is the oldest surviving Tamil grammar
Pallava Founder
Simhavishnu; greatest king was Narasimhavarman I (Mamalla) who built Mamallapuram
Chola Founder
Vijayalaya (848 CE); greatest were Rajaraja I and Rajendra I
Brihadeeswarar Temple
Built by Rajaraja I in 1010 CE at Thanjavur; UNESCO World Heritage Site
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Simplification — Aptitude and Mental Ability Test · 12 cards
BODMAS Rule
Operations must be performed in the order—Brackets, Orders (powers and roots), Division, Multiplication, Addition, Subtraction. Division and multiplication are done left to right; same for addition and subtraction.
Brackets Hierarchy
Solve innermost brackets first. The order is: Vinculum (bar), then Parentheses ( ), then Curly Braces { }, then Square Brackets [ ].
Fractions
A fraction a/b represents a parts out of b equal parts. To add or subtract fractions, find a common denominator. To multiply, multiply numerators and denominators. To divide, multiply by the reciprocal.
Decimals
Decimals are fractions with denominators as powers of 10. Converting between fractions and decimals is essential—memorize common conversions like 1/4 = 0.25, 1/8 = 0.125.
Square Roots
√a is the number which, when squared, gives a. Key values: √2 ≈ 1.414, √3 ≈ 1.732, √5 ≈ 2.236. Perfect squares up to 625 should be memorized.
Cube Roots
∛a is the number which, when cubed, gives a. Memorize cubes: 2³ = 8, 3³ = 27, 4³ = 64, 5³ = 125, up to 10³ = 1000.
Simplification of Surds
√a × √b = √(ab); √a ÷ √b = √(a/b); (√a)² = a. Rationalize denominators when needed.
Approximation Technique
When answer choices are well-separated, round numbers strategically to save time. Always check if approximation is safe before using it.
BODMAS order
B → O → D → M → A → S (left to right for same-level operations)
Fraction addition
a/b + c/d = (ad + bc)/bd
Fraction multiplication
a/b × c/d = ac/bd
Fraction division
a/b ÷ c/d = a/b × d/c
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Ratio and Proportion — Aptitude and Mental Ability Test · 12 cards
Ratio
is a comparison of two quantities of the same unit, written as a:b or a/b. The first term (a) is the antecedent, the second (b) is the consequent.
Proportion
means two ratios are equal. If a:b = c:d, then a, b, c, d are in proportion. Here, a and d are extremes, b and c are means.
Product of extremes = Product of means
In a:b::c:d, we have a × d = b × c. This is the fundamental rule for solving proportion problems.
Direct Proportion
When one quantity increases, the other increases proportionally. Example: More items purchased → More money spent.
Inverse Proportion
When one quantity increases, the other decreases proportionally. Example: More workers → Less time to complete work.
Compound Ratio
The ratio of products of corresponding terms. Compound ratio of a:b and c:d is ac:bd.
Duplicate Ratio
The ratio of squares. Duplicate ratio of a:b is a²:b².
Sub-duplicate Ratio
The ratio of square roots. Sub-duplicate ratio of a:b is √a:√b.
Ratio a:b in fraction form
a/b
Proportion rule
If a:b = c:d, then ad = bc
Dividing N in ratio a:b
First part = N × a/(a+b), Second part = N × b/(a+b)
Dividing N in ratio a:b:c
Parts are Na/(a+b+c), Nb/(a+b+c), Nc/(a+b+c)
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Time and Work — Aptitude and Mental Ability Test · 7 cards
Work as a unit
Assume total work = 1 unit (or LCM of given days for easier calculation). If A completes work in 10 days, A's 1 day work = 1/10.
Combined work
When A and B work together, their combined 1 day work = 1/A + 1/B. Time to complete = 1/(combined rate).
Inverse relationship
More workers = less time (assuming equal efficiency). If 5 men finish in 10 days, 10 men finish in 5 days.
Efficiency concept
If A is twice as efficient as B, A does in 1 day what B does in 2 days. Efficiency and time are inversely proportional.
Pipes filling tanks
Inlet pipe fills, outlet pipe empties. Net rate = filling rate − emptying rate.
Negative work
When someone destroys work or a pipe empties a tank, treat their contribution as negative in calculations.
LCM method
Taking total work as LCM of given times converts fractions to whole numbers, making arithmetic faster.
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Time and Distance — Aptitude and Mental Ability Test · 12 cards
Fundamental Relationship
Speed = Distance ÷ Time. This single formula, rearranged appropriately, solves most problems. Distance = Speed × Time. Time = Distance ÷ Speed.
Unit Conversion is Critical
Converting km/hr to m/s requires multiplying by 5/18. Converting m/s to km/hr requires multiplying by 18/5. Wrong units = wrong answer.
Relative Speed (Same Direction)
When two objects move in the same direction, relative speed = difference of their speeds. The faster object "catches up" at this rate.
Relative Speed (Opposite Direction)
When two objects move toward each other, relative speed = sum of their speeds. They approach each other faster.
Train Crossing a Stationary Object
The train must cover its own length to completely cross a pole or a person (length negligible).
Train Crossing a Platform/Bridge
The train must cover its own length plus the length of the platform.
Boats and Streams
Downstream speed = boat speed + stream speed. Upstream speed = boat speed − stream speed.
Average Speed
For equal distances at different speeds, average speed = 2ab/(a+b), not the arithmetic mean.
Speed = Distance/Time
Basic relationship
km/hr to m/s: multiply by 5/18
72 km/hr = 72 × 5/18 = 20 m/s
m/s to km/hr: multiply by 18/5
15 m/s = 15 × 18/5 = 54 km/hr
Time to cross pole = Length of train/Speed
Train crossing stationary point
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Puzzles — Aptitude and Mental Ability Test · 12 cards
Linear Seating
People sit in a row facing one direction (North or South). Positions are numbered left to right. "Left of A" means toward position 1; "right of A" means toward the higher position number.
Circular Seating
People sit around a table. Clarify whether they face the center (most common) or face outward. "Immediate left" in a center-facing circle means clockwise-next person from that seat's perspective.
Scheduling Puzzles
Assign persons to days, time slots, or floors. Create a grid with slots as rows and fill names based on conditions. Treat it like a matching problem.
Grouping Puzzles
Divide a set into teams or categories (e.g., Team A vs Team B, or departments). Use Venn-style groupings or columns to track membership.
Definite vs Possible Positions
Some conditions fix a position ("A sits at the left end"). Others give relative info ("B is two places from C")—these create multiple scenarios until resolved.
Negative Conditions
"A does not sit adjacent to B" eliminates possibilities. Mark these constraints clearly and check them at the end.
Pivot Elements
Start with the most constrained person—one mentioned in multiple conditions. Build the arrangement around this pivot.
Linear row of n persons
n positions numbered 1 to n; position 1 is leftmost
Immediate neighbour
Person directly next (no gap); exactly 1 position apart
"Two places to the right"
Skip one seat; difference of 2 positions
Circular table, n persons
n seats; each person has exactly 2 neighbours
Clockwise vs anti-clockwise
In center-facing circle, clockwise = to your left from bird's-eye view
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Dice and Cubes — Aptitude and Mental Ability Test · 6 cards
Standard Dice Rule
A standard dice always has opposite faces summing to 7. The pairs are: 1-6, 2-5, 3-4. TNPSC questions may use standard or non-standard dice—read carefully.
Opposite Face Identification
When two positions of the same dice are shown, faces appearing together (adjacent) in any view can never be opposite to each other.
Common Vertex Rule
When three faces meet at a corner, none of these three can be opposite to each other. The remaining three faces (not visible) form their opposites.
Rotation Principle
A dice can be rotated in any direction, but opposite faces remain constant regardless of orientation.
Painted Cube Concept
When a cube of side 'n' units is painted and cut into unit cubes, the position of smaller cubes determines how many faces are painted (corner = 3 faces, edge = 2 faces, face-center = 1 face, interior = 0 faces).
Net of a Cube
When a cube is unfolded into a flat pattern (net), understanding which faces become opposite helps solve certain problems quickly.
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Alphanumeric Reasoning — Aptitude and Mental Ability Test · 7 cards
Alphabet Position Values
Every letter has a fixed position—A=1, B=2... Z=26. This is the foundation for all alphanumeric problems. Also memorize reverse positions: Z=1, Y=2... A=26.
Coding-Decoding Principle
A word is transformed into a code using a consistent rule. Your job is to either find the rule from examples or apply a given rule to a new word.
Letter Shifting
The most common coding pattern. Each letter moves forward or backward by a fixed number. Example: +2 shift means A→C, B→D, C→E.
Position-Based Coding
Letters are replaced by their position numbers or by calculations involving positions. Example: CAT → 3-1-20 or 3+1+20=24.
Opposite Letter Pairing
A pairs with Z, B with Y, C with X, and so on. The sum of positions of opposite letters is always 27.
Middle Letter Concept
M and N are the middle letters of the alphabet. Letters A-M are the first half (positions 1-13), N-Z are the second half (14-26).
Alphabet Series Patterns
Finding the next letter in a sequence using gaps like +1, +2, +3 (increasing) or alternating patterns.
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Number Series — Aptitude and Mental Ability Test · 12 cards
Arithmetic Progression (AP)
Each term increases or decreases by a constant value. Example: 3, 7, 11, 15, 19 (common difference = 4).
Geometric Progression (GP)
Each term is multiplied or divided by a constant value. Example: 2, 6, 18, 54, 162 (common ratio = 3).
Difference of Differences
When first differences aren't constant, check second-level differences. If 2, 5, 10, 17, 26... has differences 3, 5, 7, 9 (increasing by 2), the pattern is in the second level.
Square and Cube Series
Terms are perfect squares (1, 4, 9, 16, 25) or cubes (1, 8, 27, 64, 125), or derived from them (n² + 1, n³ – n).
Alternating Series
Two separate patterns interleaved. In 2, 5, 4, 10, 6, 15, odd positions (2, 4, 6) and even positions (5, 10, 15) follow different rules.
Mixed Operations
Different operations applied in rotation. Example: ×2, +3, ×2, +3 pattern.
Prime Number Series
Terms are prime numbers (2, 3, 5, 7, 11, 13) or differences between consecutive primes.
Wrong Term Detection
One term violates the pattern. Identify the rule, then find which term doesn't fit.
AP
How to Identify: Constant difference between consecutive terms · Example: 5, 12, 19, 26 → difference is 7
GP
How to Identify: Constant ratio between consecutive terms · Example: 3, 12, 48, 192 → ratio is 4
n² series
How to Identify: Terms are 1, 4, 9, 16, 25, 36... · Example: Perfect squares
n³ series
How to Identify: Terms are 1, 8, 27, 64, 125... · Example: Perfect cubes
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Data Interpretation — Aptitude and Mental Ability Test · 12 cards
Tables
present exact numerical data in rows and columns. Read row and column headers carefully—they tell you what each number represents.
Bar Graphs
use rectangular bars to compare quantities. Bars can be vertical or horizontal. The height or length represents the value; always check the scale on the axis.
Pie Charts
show parts of a whole as sectors of a circle. The entire circle = 360° = 100%. Each sector's angle or percentage represents its share of the total.
Line Graphs
display trends over time. The slope of the line indicates rate of change—steeper means faster change. Points on the line show exact values at specific times.
Percentage Change Formula
Change% = [(New – Old) / Old] × 100. A common calculation across all DI types.
Central Angle in Pie Chart
If a category is x% of total, its angle = (x/100) × 360° = 3.6x degrees.
Approximation is your friend
In MCQs, round numbers sensibly to save time. If options are far apart, rough calculation is enough.
Always note units
Lakhs vs crores, kg vs tonnes, per month vs per year—unit errors cause wrong answers despite correct calculation.
Percentage of total
(Part / Total) × 100
Percentage increase
[(Final – Initial) / Initial] × 100
Percentage decrease
[(Initial – Final) / Initial] × 100
Pie chart angle
(Value / Total) × 360°
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