1.

The molecule having smallest bondangle is :

Answer»

`NCl_(3)`
`AsCl_(3)`
`SbCl_(3)`
`PCl_(3)`

Solution :All the members form volatile HALIDES of the type `AX_(3)` All halides are pyramidal in SHAPE. The bond angle decreases on MOVING down the group due to decrease in bond pair-bond pair repulsion.
`{:(NCl_(3),PCl_(3),AsCl_(3),SbCl_(3)),(107^(6),109.5^(@),98^(@),98.2^(@)):}`


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