Which of the following species has plane tringular shape ?

Options

A. `N_(3)^(-)`
B. `NO_(3)^(-)`
C. `NO_(2)^(-)`
D. `CO_(2)`

Answer

b

Explanation

Hybridazation of `NO_(3)^(-) = (1)/(2) ( 5 + 0 + 1 - 0) = (6)/(2) = 3`
`sp^(2)`, hence geometry is trigonal planner `NO_(2)^(-)` (nitrite ion) also has `sp^(2)` hybrization and gives a trigonal planner grometry is bent with `120^(@)` bond angular