Assertion :Transition metals show variable valence. Reason: Due to a large energy difference between the $n s^{2}$ and $(n - 1) d$ electrons.

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 C Assertion is correct but Reason is incorrect
The assertion is correct but the reason is false.

Transition metals show variable valency due to very small difference between the $n s$ and $(n - 1) d$ electrons.

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Assertion :Transition metals show variable valence. Reason: Due to a large energy difference between the ns2 and (n−1)d electrons.

The correct option is C Assertion is correct but Reason is incorrectThe assertion is correct but the reason is false. Transition metals show variable valency due to very small difference between the ns and (n−1)d electrons.

Assertion :Transition metals show variable valence. Reason: Due to a large energy difference between the $n s^{2}$ and $(n - 1) d$ electrons.

The correct option is C Assertion is correct but Reason is incorrect
The assertion is correct but the reason is false.

Transition metals show variable valency due to very small difference between the $n s$ and $(n - 1) d$ electrons.