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Q.

Assertion: Cuprous ion (Cu+)  has unpaired electrons while cupric (Cu++)  does not.
Reason: Cuprous ion  (Cu+) is colourless whereas cupric ion (Cu++)  is blue in the aqueous solution.
 

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a

Both Assertion (A) and Reason (R) are the true and Reason (R) is a correct explanation of Assertion (A).

b

Both Assertion (A) and Reason (R) are the true but Reason (R) is not a correct explanation of Assertion (A).

c

Assertion (A) is true and Reason (R) is false.

d

Assertion (A) is false and Reason (R) is true.

answer is D.

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Detailed Solution

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Cu+ has all paired electrons while Cu+2 has one unpaired electron

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