Assertion: Transition metals show variable valency.
Reason: Transition metals have a large energy difference between the ns² and $(n - 1) d$ electrons

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A is true but R is false.

Both A and R are true but R is not the correct explanation of A.

Both A and R are true and R is the correct explanation of A.

A is false but R is true.

answer is A.

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Detailed Solution

The statement 1 is correct but the statement 2 is false. Actually transition metal show variable valency due to very small difference between the ns² and(n−1)d electrons

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