Question

Green coating on copper in rainy season is due to the formation of: (a)CuC03(b) CU(OH)2 (c) CuC03.Cu(OH)2 (d) CuS

Answer 1

CuCO3 is The correct answer

Answer 2

Answer:

The answer is c) $CuCO_3.Cu(OH)_2$

Explanation:

When copper metal is exposed to air, it corrodes and turns green.

When copper vessels are exposed to air for a period of time during the rainy season, the metal reacts with the gases and moisture in the air to generate a mixture of copper carbonate and copper hydroxide

[ ($CuCO_3) .Cu(OH)_2$].

The vessels take on a green hue as a result of this.

The chemical reaction is as follows:

             $Cu + H_2O + CO_2 +O_2$  → $CuCO_3 + Cu(OH)_2$

                                                         Green coating