Question

If copper is kept open in air it slowly loses its shining brown surface brown surface and gains a green coating. It is due to the formation of?

Answer 1

Answer:Copper carbonate

Explanation:

Answer 2

When we keep copper in open air a green layer covers the shining brown surface of the copper because -

• There is plenty amount of carbon dioxide gas present in our atmosphere which reacts with the external copper surface.

• In this chemical reaction,a green coloured chemical substance is produced which is also known as the copper carbonate.

• The production of this copper carbonate turns the shining brown copper into pale green.

Chemical reaction :

2 Cu + 3 CO2 = 2CuCO3 (green)