Post-UTME Chemistry 2010 Objective — Question 6
Question 6 of 10 from the Post-UTME Screening (Post-UTME) Chemistry 2010 Objective paper, with the correct answer and a full explanation.
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When ammonium, potassium and calcium carbonates are each separately heated
- A. none of them will decompose
- B. each of them will decompose to give carbon dioxide and the respective oxide
- C. ammonium carbonate and potassium carbonate will not decompose
- D. only ammonium carbonate and calcium carbonate will decompose to carbon dioxide and the respective oxide
Explanation
Ammonium carbonate decomposes on heating into carbon dioxide, water and ammonia (unlike the more thermally stable potassium carbonate).
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