What is the green colour coating that forms on copper when it is left open?

Copper sulphate

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Copper carbonate

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Copper chloride

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Copper hydride

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Solution

The correct option is B
Copper carbonate

When exposed to the atmosphere, copper forms a layer of copper carbonate which has a green shade. This is responsible for the phenomenon of copper turning green when left in the open.

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Q. What is the green colour coating that forms on copper when it is exposed to the atmosphere?

When copper vessels are exposed to moist air for a long time, a green coating is formed. Which are the constituents of the coating?
(i) Copper hydroxide
(ii) Copper carbonate
(iii) Copper oxide

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What is the green colour coating that forms on copper when it is left open?

The correct option is B Copper carbonate When exposed to the atmosphere, copper forms a layer of copper carbonate which has a green shade. This is responsible for the phenomenon of copper turning green when left in the open.

The correct option is B
Copper carbonate

When exposed to the atmosphere, copper forms a layer of copper carbonate which has a green shade. This is responsible for the phenomenon of copper turning green when left in the open.