Assertion :The covalence of nitrogen in $N_{2} O_{5}$ is 5. Reason: Nitrogen can expand its covalence beyond 4.

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 D Both Assertion and Reason are incorrect
Hence, it forms 4 covalent bonds with oxygen. It cannot expand its covalence beyond 4 due to the non-availability of d-orbital.

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