In compounds of type `ECI_(3)`, where `E=BP`, As or `B`, the angles `CI-E-CI` for different `E` are in the order

Options

A. BgtP=As =Bi
B. BgtPgtAs gtBi
C. BltP=As=Bi
D. BltPltAsltBi

Answer

B

Explanation

In `BCl_(3), H=1/2(3+3+0-0)=3, sp^(2)` hybridization (bond angle =`120^(@)`) similarly `PCl_(3), AsCl_(3)` and `BiCl_(3)` are found to have `sp^(3)` hybridised central atom with one lone pair of have `sp^(3)` hybridised central atom with one lone pair of electron on the central atom 1 bond angle `le 109^(@)28'` since the central atom belong to the same group, the bond angle of the chlorides decreases as we go down the group. thus the order of bond angle is, `BCl_(3) gt PCl_(3) gt AsCl_(3) gt BiCl_3`