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How do Metal React with Solution of Other Metal Salts

When a reddis...

Question

When a reddish brown metal X comes in contact with air and moisture, it forms a green covering of metal carbonate over the metal X. What is X?

A

Copper

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B

Iron

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C

Aluminium

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D

Zinc

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Solution

The correct option is A
Copper

When reddish brown metal copper comes in contact with air and moisture, it gets covered with a green layer of basic copper carbonate in the presence of $C O_{2}$ and moisture.

$2 C u + O_{2} + C O_{2} + H_{2} O \to C u C O_{3} . C u (O H)_{2}$

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