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Reaction with Oxygen

Copper underg...

Question

Copper undergoes corrosion in the presence of , oxygen, and water vapour to form __.

A

carbon dioxide, copper carbonate

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B

carbon monoxide, copper hydroxide

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C

hydrogen sulphide, copper hydroxide

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D

hydrogenn sulphide, copper carbonate

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Solution

The correct option is A carbon dioxide, copper carbonate
Copper reacts with carbon dioxide gas, oxygen gas, and water vapour present in the atmosphere to form a green layer of basic copper carbonate on its surface.
$2 Cu (s) + H_{2} O (g) + {CO}_{2} (g) + O_{2} (g) \to {CuCO}_{3} (s) + Cu {(OH)}_{2} (s)$

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B

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A

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C O_{2 (g)}

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B

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C

which turns acidified

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to green solution.

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D

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B

undergoes roasting to form a solid and a gas

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[CPMT 1985]

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