Question

Question No. 30
When a copper vessel is exposed to moist air for long, it acquires a dull green coating which is a mixture of
A) Copper hydroxide and copper nitrate
B) Copper oxide and copper nitrate
C) Copper carbonate and copper sulphate
D) Copper hydroxide and copper carbonate

Answer 1

Answer:

The correct option is option D

Explanation:

Copper forms a green deposit on its surface when exposed to air which is usually a mixture of copper carbonate and copper hydroxide.

Answer 2

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Option (D)

Copper is a chemical element with the symbol Cu (from Latin: cuprum) and atomic number 29. It is a soft, malleable, and ductile metal with very high thermal and electrical conductivity. A freshly exposed surface of pure copper has a pinkish-orange color.