The correct order of increaisng bond angles is :

Options

A. `PF_3 lt PCl_3 lt PBr_3 lt PI_3`
B. `PF_3 gt PBr_3 lt PC_3lt gt PI_3`
C. `PI_3 gt PBr_3 gt PCl_3 gt PF_3`
D. `PF_3lt pCl_3 gt PBr_3 gt PI_3`

Answer

D

Explanation

`PCl_3 lt PBr_3 lt PI_3` bond angle order is explained in terms of increasing electronegativity fo halogen atom whereas ` PF-3 gt PCl_3` bond angle are explained in terms of ` p pi-d pi` bonding in ` PF_3`, The bond angels are ` 97^@, 100^@, 101.5^@` and ` 102^@` for ` PCl_3` PBr_3` PI_3` and ` PF_3` respectively .