Chemistryeasy · Past Paper
The greenish coating formed on copper when exposed to moist air is due to:
ACopper Oxide
BBasic Copper Carbonate
CCopper Sulphate
DCopper Nitrate
✓ Correct Answer: B — Basic Copper Carbonate
Copper reacts with carbon dioxide and moisture to form basic copper carbonate [CuCO3.Cu(OH)2].
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