Question

What happens when a moist copper vessel is
exposed to air for a long time? Also write
the chemical reaction involved?​

Answer 1

Answer:

Copper forms a green deposit on its surface when exposed to air for a long time. This layer is usually a mixture of copper carbonate and copper hydroxide.

The chemical reaction is

2Cu + H2O + CO2 + O2 → Cu(OH)2 + CuCO3