Correct order of bond angles for the following is

Options

A. `NH_3 gt PCl_3 gt BCl_3`
B. `BCl_3 gt NH_3 gt PCl_3`
C. `BCl_3 gt PCl_3 gt NH_3`
D. `PCl_3 gt BCl_3 gt NH_3`

Answer

B

Explanation

`BCl_3` is trigonal in shape where bond angle is `120^@`. In `NH_3 and PCl_3` (both are having tetrahedral geometry) though the central atom has equal no. of lone pairs and bond pairs, the valence shell of P is relatively bigger and bond angle is lower.