Question
The green patches that form on the surface of copper is –
- CuSO4
- Cu(OH)2
- CuO
- CuSO4.3Cu(OH)2
Answer
(d) CuSO4.3Cu(OH)2
Explanation:
The green patches formed on the surface of copper are due to the formation of copper carbonate (CuCO3) or copper hydroxide (Cu(OH)2), which are the result of the reaction of copper metal with atmospheric carbon dioxide and moisture.