Asked in FBISE Chemistry 2022 — Paper 1 2022Moderate

Which of the following carbides is decomposed by water to form CH4 gas?

Correct answer: A. Be2C

  • A. Be2C
  • B. CaC2
  • C. MgC2
  • D. SrC2

Explanation

Beryllium carbide does not decompose with water to form CH4 gas. It is generally less reactive compared to calcium carbide.

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About Reactions of Group IV Elements

Group IV, or Group 14, chemistry covers the trends from carbon and silicon to tin and lead, including their reactions with oxygen, halogens, water, acids and alkalis. It also examines the structures and properties of their oxides and chlorides, oxidation states, and the inert pair effect, rather than treating all members as equally metallic.

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