The `ONO` bond angle is maximum in

Options

A. `NO_3^(-)`
B. `NO_2^(-)`
C. `NO_2`
D. `NO_2^(+)`

Answer

D

Explanation

Unlike others, `NO_2^(+)` is linear (steric number of `N` is `2+0=2`) and, therefore, has the highest bond angle, `180^@`. `NO_3^(-)` is trigonal planar with a bond angle of `120^@`. `NO_2^(-)` is angular (`SN` is `2+1=3`), with one lone pair of electrons, its bond angle is `115^@`. `NO_2` is also angular with one odd `e^(-)`, its bond angle is `132^@`. Thus, bond angles are in the order
`NO_2^(+)gtNO_2gtNO_3^(-)gtNO_2^(-)`