Assertion :Bond dissociation energy of $N - F$ bond in $N F_{3}$ molecule is lower than that of in $N C l_{3}$ molecule. Reason: Inter electronic repulsion exists between small size N and F atoms in $N - F$ bond of $N F_{3}$ molecule.

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
The bond dissociation energy of N−F bond in NF3 molecule is lower than that of in NCl3 molecule. the statement is incorrect
and
Inter electronic repulsion exists between small size N and F atoms in the N−F bond of NF3 molecule. this is incorrect
so both assertion and reason is incorrect

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Assertion :Bond dissociation energy of N−F bond in NF3 molecule is lower than that of in NCl3 molecule. Reason: Inter electronic repulsion exists between small size N and F atoms in N−F bond of NF3 molecule.

Assertion :Bond dissociation energy of $N - F$ bond in $N F_{3}$ molecule is lower than that of in $N C l_{3}$ molecule. Reason: Inter electronic repulsion exists between small size N and F atoms in $N - F$ bond of $N F_{3}$ molecule.