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When ammonium, potassium and calcium carbonates are each separately heated

Chemistry
JAMB 1979

When ammonium, potassium and calcium carbonates are each separately heated

  • A. none of them will decompose
  • B. each of them will decompose to give carbondioxide and the respective oxide
  • C. ammonium carbonate and potassium carbonate will not decompose
  • D. only ammonium carbonate and the respective oxide
  • E. ammonium carbonate will decompose to give carbondioxide, water and ammonia
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Correct Answer: Option E
Explanation

 Solid ammonium carbonate decomposes as it is heated.

 (NH4)2CO3 → 2 NH3 + CO2 + H2O

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