A copper vessel acquires a green coloured coating when kept in moist air for a few days. The green coloured substance is chemically

Acidic copper oxide

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Basic copper sulphate

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Hydrated copper sulphate

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Basic copper carbonate

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Solution

The correct option is D
Basic copper carbonate
The copper vessel gets corroded when kept in moist air for a few days and a green coloured substance is formed which is a mixture of copper hydroxide (Cu(OH)2) and copper carbonate (CuCO3) and is known as basic copper carbonate.

Hence, the correct answer is option (d).

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Similar questions

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

Q. The green coloured coating that develops on a copper rod when it is left in open for some days, is of .

When a copper object is exposed to moist air for a long time,then a green coating is formed on its surface.

(a) What is the material of the green coating ?

(b) State whether the green coating is acidic or basic.

When a vessel is exposed to moist air for a long time,then a green coating is formed on its surface.The vessel must be made of :

(a) zinc

(b) magnesium

(d) copper

Why does copper vessel acquire green coating in rainy season?

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