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The molecule having smallest bond angle ...

The molecule having smallest bond angle is

A

`AsCl_(3)`

B

`SbCl_(3)`

C

`PCl_(3)`

D

`NCl_(3).`

Text Solution

Verified by Experts

The correct Answer is:
B
All are trichlorides of elements of groups 15 and have molecule. Down the group, the atomic size increases and as a redult, the repulsion in bond pair : lone pair of electrons decteases which leads to decrease in bond angle.
Increasing order of atomic radil :
`Nlt Plt As ltSb`
Decreasing order of bond angles :
`NCl_(3) gtPCl_(3)gtAsCl_(3)gtSbCl_(3)`
`therefore SbCl_(3)` has the smallest bond angle.
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