Assertion :Dipole moment of $N H_{3}$ is greater than that of $N F_{3}$ . Reason: Nitrogen is more electronegative than fluorine.

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 C Assertion is correct but Reason is incorrect
Correct reason:- in $N H_{3}$ all dipole moment vectors are in the same direction while in $N F_{3}$ all three dipole moment in one direction and one in opposite direction that is the reason $N H_{3}$ has higher dipole moment than $N F_{3}$ ,
So the correct option is [C]

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Assertion :Dipole moment of NH3 is greater than that of NF3. Reason: Nitrogen is more electronegative than fluorine.

Assertion :Dipole moment of $N H_{3}$ is greater than that of $N F_{3}$ . Reason: Nitrogen is more electronegative than fluorine.