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Which is the correct arrangement of the molecules basexd on dipole moments ?

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Which is the correct arrangement of the molecules basexd on dipole moments ?
A. `BF_3`gt `NF_3` gt `NH_3`
B. `NF_3`gt `BF_3` gt `NH_3`
C. `NH_3`gt `BF_3`gt `NF_3`
D. `NH_3`gt `NF_3` gt `BF_3`
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Correct Answer - D
`BF_3` being trigonal planar has `mu` = 0.
In `NF_3` the lone pair moment opposes the dipole na of N-F bonds while in `NH_3`. the lone pair moment reinforces the dipole moments of N-H bonds
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