Which of the following statements is correct?

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(B) The dipole moment of $NH_3$ is $1.46 \ D$ and that of $NF_3$ is $0.24 \ D$. In $NH_3$,the orbital dipole moment due to the lone pair is in the sam

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The dipole moment of $NF_3$ is less than that of $NH_3$.

Vedclass · Answer

(B) The dipole moment of $NH_3$ is $1.46 \ D$ and that of $NF_3$ is $0.24 \ D$. In $NH_3$,the orbital dipole moment due to the lone pair is in the same direction as the resultant dipole moment of the $N-H$ bonds. In $NF_3$,the orbital dipole moment due to the lone pair is in the opposite direction to the resultant dipole moment of the $N-F$ bonds,leading to a smaller net dipole moment. Therefore,$\mu_{NF_3} < \mu_{NH_3}$.

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