Assertion : Nitrogen cannot show the “+5” oxidation state in its compounds.
Reason : Maximum covalency of nitrogen is four.

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Both A and R are correct but R is NOT the correct explanation of A

A is not correct but R is correct

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

A and R are not correct

answer is C.

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Detailed Solution

Oxidation state is not valency. Oxidation state is a charge assumed to be present on an atom using some arbitrary rules. ‘N’ can show +5 state Ex: $N_{2} O_{5}, H N O_{3}$

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