Question

Corrosion of copper produces

• A. copper oxide
• B. copper carbonate
• C. copper sulphate
• D. pure copper

Answer 1

The Correct Option is B

Correct answer: copper carbonate

Explanation:
When copper is exposed to moist air for a long time, it reacts with carbon dioxide (CO₂), oxygen (O₂), and water (H₂O) to form a greenish layer on its surface. This green layer is a mixture of basic copper carbonate, primarily:

$$\text{Cu(OH)}_2 \cdot \text{CuCO}_3$$

This process is called corrosion of copper, and it results in the formation of copper carbonate.

✅ Hence, corrosion of copper produces copper carbonate.