BSSC Inter Level 2021 previous year paper practice · PYQ-pattern set

BSSC Inter Level 2021 PYQ-pattern questions

Showing 10 of the 18 PYQ-pattern questions in this set — freshly worded in that year's pattern, not the original questions. Answers and solutions open under each question.

1. Q1 · Heat and Thermodynamics

   Which of the following methods of heat transfer does NOT require a material medium?

   • A. Conduction
   • B. Convection
   • C. Radiation
   • D. All require a medium
   Answer and solution

   Answer: C

   Radiation does not require a material medium for heat transfer as it occurs through electromagnetic waves, whereas conduction and convection both require a medium.

2. Q2 · Bihar — Specific GK

   Which river is known as the 'Sorrow of Bihar' due to frequent devastating floods?

   • A. Ganga
   • B. Son
   • C. Kosi
   • D. Gandak
   Answer and solution

   Answer: C

   The Kosi river is called the 'Sorrow of Bihar' because it frequently changes its course and causes devastating floods in the region, affecting millions of people.

3. Q3 · Acids, Bases and Salts

   Which indicator turns red in acidic solution and blue in basic solution?

   • A. Phenolphthalein
   • B. Methyl orange
   • C. Litmus
   • D. Turmeric
   Answer and solution

   Answer: C

   Litmus is a natural indicator that turns red in acidic solutions and blue in basic solutions, making it one of the most commonly used acid-base indicators.

4. Q4 · Electricity and Magnetism

   Three resistors of 2Ω, 3Ω and 6Ω are connected in parallel. The equivalent resistance of the combination is:

   • A. 1Ω
   • B. 2Ω
   • C. 3Ω
   • D. 11Ω
   Answer and solution

   Answer: A

   For parallel combination: 1/R = 1/2 + 1/3 + 1/6 = (3+2+1)/6 = 6/6 = 1. Therefore, R = 1Ω.

5. Q5 · Environment and Ecology

   Which of the following organisms are considered primary producers in an aquatic ecosystem?

   • A. Zooplankton
   • B. Small fish
   • C. Phytoplankton
   • D. Aquatic insects
   Answer and solution

   Answer: C

   Phytoplankton are primary producers in aquatic ecosystems as they perform photosynthesis and form the base of the food chain, converting sunlight into organic matter.

6. Q6 · Human Body

   Which gland in the human body is known as the 'master gland' because it regulates the functions of other endocrine glands?

   • A. Thyroid gland
   • B. Pituitary gland
   • C. Adrenal gland
   • D. Pancreas
   Answer and solution

   Answer: B

   The pituitary gland is called the master gland because it secretes hormones that control other endocrine glands including thyroid, adrenal glands, and reproductive organs.

7. Q7 · Average

   The average of five consecutive odd numbers is 41. What is the largest of these numbers?

   • A. 45
   • B. 43
   • C. 47
   • D. 41
   Answer and solution

   Answer: A

   For five consecutive odd numbers, the middle (third) number equals the average = 41. The numbers are 37, 39, 41, 43, 45. The largest is 45.

8. Q8 · Percentage

   The price of a commodity increases by 25%. By what percentage must a consumer reduce his consumption so that his expenditure on the commodity remains unchanged?

   • A. 20%
   • B. 25%
   • C. 30%
   • D. 15%
   Answer and solution

   Answer: A

   Let original price = 100, new price = 125. To keep expenditure same, reduction in consumption = (25/125) × 100 = 20%.

9. Q9 · Analogy

   ACEG : BDFH :: IKMO : ?

   • A. JLNP
   • B. JLMP
   • C. JKNP
   • D. JLOP
   Answer and solution

   Answer: A

   Each letter in ACEG is followed by the next letter: A→B, C→D, E→F, G→H. Similarly, I→J, K→L, M→N, O→P, giving JLNP.

10. Q10 · Direction Sense

    A man walks 8 km towards North, then turns right and walks 6 km, then turns right again and walks 4 km. In which direction is he now from his starting point?

    • A. North-East
    • B. South-East
    • C. North-West
    • D. South-West
    Answer and solution

    Answer: A

    After the movements, he is 4 km North and 6 km East from the starting point, placing him in the North-East direction.