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Which one of the following arrangements ...

Which one of the following arrangements of molecules is correct on the basic of their dipole moments?

A

`BF_(3) gt NH_(3) gt NF_(3)`

B

`BF_(3) gt NF_(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
Both `NF_(3)and NH_(3)` have identical shapes and a lone pair of electrons on nitrogen. The dipole moment of `NH_(3)` is highest than `NF_(3)` due to different direction of moment of the `N - F` and `N - H` bonds `BF_(3)` is a symmetrical molecule. It has zero dipole moment.
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  12. Which has maximum dipole moment?

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