Assertion :The bond enthalpy of nitrogen is very high which makes it a highly stable diatomic molecule. Reason: The single $N - N$ bond formed is weaker than single $P - P$ bond.

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 B Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
The single $N - N$ bonds formed is weaker than single $P - P$ bonds because of lone pair repulsion on small nitrogen molecule. The bond enthalpy of nitrogen is very high because of the extremely strong triple bond.

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Assertion :The bond enthalpy of nitrogen is very high which makes it a highly stable diatomic molecule. Reason: The single N−N bond formed is weaker than single P−P bond.

Assertion :The bond enthalpy of nitrogen is very high which makes it a highly stable diatomic molecule. Reason: The single $N - N$ bond formed is weaker than single $P - P$ bond.