Question

Green colour coating on copper utensils is due to the formation of a) CuCO3 b) Cu(OH)2 c) CuO d) None

Answer 1

Answer:

I think option a is correct

Answer 2

Answer:

The Correct Answer is (D)none

i.e  Cu(OH)2.CuCO3.

explanation:

All copper vessels develop a green coloured layer on their surface when exposed to moist air for a long time.

In this chemical process, copper corrodes by oxidation, in which copper reacts with oxygen in the air to form copper oxide.  Copper oxide then combines with carbon dioxide to make copper carbonate, which gives it a green colour. This process is called the corrosion of copper.

The green material is a mixture of copper hydroxide (Cu(OH)2) and copper carbonate (CuCO3).

#spj3