The correct order of bond angles (smallest first) in `H_2 S, NH_3, BF_3 and SiH_4` is

Options

A. `H_2S lt SiH_4 lt NH_4 lt BF_3`
B. `NH_3 lt H_2S lt SiH_4 lt BF_3`
C. `H_2S lt NH_3 lt SiH_4 lt BF_3`
D. `H_2S lt NH_3 lt BF_3 lt SiH_4`

Answer

A

Explanation

The correct order of bond angle (smaller first ) is `H_2S lt NH_3 lt SiH_4 lt BF_3`
`92.6^(@) lt 107^@ lt 109^@ 28' lt 120^@`