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Which of the following is the correct order of dipole moment?
Detailed Solution
$BF_3$ is symmetrical trigonal planar ($\mu=0$). In $NH_3$ the lone pair moment adds to the N-H bond moments, while in $NF_3$ it opposes the N-F bond moments, so $NH_3>NF_3$. $H_2O$ has the highest dipole moment. Order: $BF_3<NF_3<NH_3<H_2O$.