O-LevelChemistryAcids, Bases & Salts5070/11 · Oct/Nov 2011 · Q251 Mark

Which carbonate decomposes on heating to give a black solid and a colourless gas?

Acalcium carbonate

Bcopper(II) carbonate

Csodium carbonate

Dzinc carbonate

✓ Correct answer

B: copper(II) carbonate

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Topic: Acids, Bases & Salts, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source: O-Level Chemistry, Oct/Nov 2011 Paper 1 Variant 1, question 25.

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