Assertion :A greenish layer appears on copper vessels, if left uncleaned. Reason: It is due to the formation of a layer of basic copper carbonate.

Read both the above assertion and reason and choose the correct option of it.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Both Assertion and Reason are incorrect

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Solution

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
The assertion is correct, because the copper vessels if left uncleaned, a green layer is formed.

The reason is also correct, it is due to the formation of basic copper carbonate.

Basic copper carbonate $-$ $C u_{2} {C O}_{3} {(O H)}_{2}$
(green in colour)

$C u (s) + C O_{2} (g) + O_{2} (g) + H_{2} O (l) moist air \to C u C O_{3} . C u (O H)_{2}$

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