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NCERT Class 10 Science Carbon and its Compounds: In-text questions (page 61) Solutions
AI-written, checked on 23 Oct 2026
Solutions written by Shishya, checked — not the board's official answers
Step-by-step working for every question of In-text questions (page 61) in NCERT's Class 10 Science book, chapter “Carbon and its Compounds”, written by Shishya. Each question is in our own short words; open the NCERT chapter for the exact wording and figures.
How these were checked: the solutions were drafted with AI and then read and corrected on 23 Oct 2026. Every numerical final answer is recomputed from the question's own numbers by a calculator check that runs before each release; proofs and explanations were read, not machine-checked. The NCERT textbook is the authority — if something here disagrees with it, follow the book.
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In-text (page 61) Q1
What is the electron-dot structure of carbon dioxide (CO₂)?
- Carbon has 4 valence electrons and each oxygen atom has 6 valence electrons.
- To complete their octets, carbon shares one pair of electrons with each oxygen atom.
- This forms two double bonds, one between carbon and each oxygen atom.
- The structure is represented as :O::C::O: with two lone pairs on each oxygen atom.
Answer: The electron-dot structure of CO₂ is :O::C::O: with two lone pairs on each oxygen atom.
In-text (page 61) Q2
What is the electron-dot structure of a sulphur molecule made of eight atoms joined in a ring?
- Sulphur has 6 valence electrons in its outermost shell.
- Each sulphur atom needs 2 more electrons to complete its octet.
- In the S8 molecule, each sulphur atom forms single covalent bonds with two neighbouring sulphur atoms.
why?
In a covalent bond two atoms share a pair of electrons so that each gets a full outer shell. Carbon forms such bonds because gaining or losing four electrons would need too much energy.
- Each bond consists of a shared pair of electrons between two sulphur atoms.
- The eight sulphur atoms are arranged in a crown-shaped ring structure.
- Each sulphur atom has two lone pairs of non-bonding electrons remaining after bonding.
- The electron-dot structure shows S atoms connected in a ring with pairs of dots representing shared electrons and lone pairs on each atom.
Answer: The electron-dot structure of S8 shows a ring of 8 sulphur atoms, each bonded to two neighbours via single covalent bonds, with two lone pairs on each atom.
Other exercises in this chapter
- In-text questions (page 68) — 5 questions
- In-text questions (page 72) — 2 questions
- In-text questions (page 74) — 2 questions
- In-text questions (page 76) — 2 questions
- End-of-chapter exercises — 15 questions
← Carbon and its Compounds: notes, practice and all exercises
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