Question

2.
A copper decorative hung outside the home lost its shining and has turned greenish.
The reason for this is, on its surface.
A) A layer of copper carbonate is formed
B) A layer of copper sulphide is forined
C) A Inyer of copper oxide is formed
D) A Inyer of copper sulphate is formed​

Answer 1

Answer:

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, 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.

Answer 2

Answer:

copper carbonate is formed