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NCERT Class 10 Science Metals and Non-metals: In-text questions (page 40) 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 40) in NCERT's Class 10 Science book, chapter “Metals and Non-metals”, 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 40) Q1
Give an example of a metal that (i) is liquid at room temperature (ii) can be cut easily with a knife (iii) is the best conductor of heat (iv) is a poor conductor of heat.
- (i) Mercury is the only metal that exists in a liquid state at room temperature.
- (ii) Sodium is a very soft metal that can be easily cut with a knife.
- (iii) Silver is the best conductor of heat among all metals.
- (iv) Lead is a poor conductor of heat compared to other common metals.
Answer: (i) Mercury; (ii) Sodium; (iii) Silver; (iv) Lead
In-text (page 40) Q2
Explain the meanings of malleable and ductile.
- Malleable refers to the property of a metal that allows it to be hammered or rolled into thin sheets without breaking.
- This property is due to the ability of metal atoms to slide over one another when force is applied.
- Ductile refers to the property of a metal that allows it to be drawn out into thin wires.
- This property is also due to the metallic bonding that holds the atoms together while allowing them to shift positions.
- Most metals are both malleable and ductile, which makes them useful for various applications like making coins or electrical wires.
Answer: Malleable means a metal can be hammered into thin sheets; ductile means a metal can be drawn into thin wires.
Other exercises in this chapter
- In-text questions (page 46) — 5 questions
- In-text questions (page 49) — 2 questions
- In-text questions (page 53) — 3 questions
- In-text questions (page 55) — 3 questions
- End-of-chapter exercises — 16 questions
← Metals and Non-metals: notes, practice and all exercises
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