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In compounds of type ECl(3), where E=B,P...

In compounds of type `ECl_(3)`, where E=B,P. As or Bi, the angles `Cl-E-Cl` for different E are in the order:

A

`BgtP=As=Bi`

B

`BgtPgtAsgtBi`

C

`B lt P=As=Bi`

D

`B lt P lt As lt Bi`

Text Solution

Verified by Experts

The correct Answer is:
B
`BCI_(3)` is trigonal planar in structure and bond angles are `120^(@)` each. `PCI_(3),AsCI_(3)` and `BiCI_(3)` pyramidal in shape with `sp^(3)`-hybridisation. In all of them, the bond angles are less than the normal tetrachedral angle of `109^(@)28'`, and also these bond angles decrese down the group. Therefore, the correct order of dond angles is as follows: `BCI_(3)gtPCI_(3)gtAsCI_(3)gtBiCI_(3)`
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