Copper becomes green when exposed to moist air for a long period. This is due to:

Question

Copper becomes green when exposed to moist air for a long period. This is due to: (A) the formation of a layer of cupric oxide on the surface of copper. (B) the formation of a layer of basic carbonate of copper on the surface of copper. (C) the formation of a layer of cupric hydroxide on the surface of copper. (D) the formation of basic copper sulphate layer on the surface of the metal.

Tardigrade Admin · Accepted Answer

Copper when exposed to moist air having CO2. It gets superficially coated with a green layer of basic carbonate CuCO3. Cu (OH)2.

Q. Copper becomes green when exposed to moist air for a long period. This is due to:

the formation of a layer of cupric oxide on the surface of copper.

the formation of a layer of basic carbonate of copper on the surface of copper.

the formation of a layer of cupric hydroxide on the surface of copper.

the formation of basic copper sulphate layer on the surface of the metal.

Copper when exposed to moist air having $C O_{2}$ . It gets superficially coated with a green layer of basic carbonate $C u C O_{3} . C u (O H)_{2}$ .

Q. Copper becomes green when exposed to moist air for a long period. This is due to:

the formation of a layer of cupric oxide on the surface of copper.

the formation of a layer of basic carbonate of copper on the surface of copper.

the formation of a layer of cupric hydroxide on the surface of copper.

the formation of basic copper sulphate layer on the surface of the metal.

Copper when exposed to moist air having CO2​. It gets superficially coated with a green layer of basic carbonate CuCO3​.Cu(OH)2​.

Copper when exposed to moist air having $C O_{2}$ . It gets superficially coated with a green layer of basic carbonate $C u C O_{3} . C u (O H)_{2}$ .