Question

Copper loses its brown layer gradually when exposed to air .give reasons

Answer 1

$\huge\mathfrak\pink{HELLO}$

Copper metal when exposed to air turns green in colour due to corrosion. When copper vessel is exposed to air in rainy season, the metal reacts with gases and moisture and atmospheric gases to form a mixture of copper carbonate and copper hydroxide. This gives a green colour to the surface of copper metal.

The reaction is as follows:

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

Answer 2

$\huge \bold{hey \: there}$

➡Copper loses its brown layer when exposed to air due to the formation of copper oxide(CuO).

➡ Copper oxide can be reduced by reacting it with hydrogen or a reducing agents(such as carbon).