Which of the following is the correct order o | vedclass

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(A) The dipole moment $(\mu)$ depends on the polarity of bonds and the geometry of the molecule.$1$. $BF_{3}$ is a planar molecule with a symmetric st

Vedclass · Accepted Answer

$BF_{3} < NF_{3} < NH_{3} < H_{2}O$

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(A) The dipole moment $(\mu)$ depends on the polarity of bonds and the geometry of the molecule.$1$. $BF_{3}$ is a planar molecule with a symmetric structure,so its net dipole moment is $\mu = 0$.$2$. $NF_{3}$ has a pyramidal structure with a lone pair. The bond dipoles of $N-F$ bonds are in the opposite direction to the lone pair dipole,resulting in a small net dipole moment $(\mu \approx 0.24 \ D)$.$3$. $NH_{3}$ has a pyramidal structure where the bond dipoles of $N-H$ bonds and the lone pair dipole are in the same direction,resulting in a higher net dipole moment $(\mu \approx 1.47 \ D)$.$4$. $H_{2}O$ has a bent structure with two $O-H$ bonds and two lone pairs,resulting in a high net dipole moment $(\mu \approx 1.85 \ D)$.Therefore,the correct order is $BF_{3} < NF_{3} < NH_{3} < H_{2}O$.

Which of the following is the correct order of dipole moment?

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