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Question
Distinguish by heating the following in dry test tubs.
Zinc carbonate, Copper carbonate and lead carbonate.
Solution
| Zinc carbonate | Copper carbonate | Lead carbonate | |
| Residue left | Zinc oxide(ZnO) | Copper oxide(CuO) | Lead Oxide (PbO) |
| Colour of residue | Yellow when hot and white when cold | Colour is Black solid. | Colour is yellow. |
| Gas produced | Carbon dioxide gas is produced. | Carbon dioxide gas is produced. | Carbon dioxide gas is produced. |
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