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Which is the correct arrangement of the ...

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`

Text Solution

Verified by Experts

The correct Answer is:
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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