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Question

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


A
Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
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B
Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
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C
Assertion is correct but Reason is incorrect
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D
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

Chemistry

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