The hybridisations of the atomic orbitals of nitrogen
Question:

The hybridisations of the atomic orbitals of nitrogen in $\mathrm{NO}_{2}^{-}, \mathrm{NO}_{2}^{+}$and $\mathrm{NH}_{4}^{+}$respectively are.

1. $\mathrm{sp}^{3}, \mathrm{sp}^{2}$ and $\mathrm{sp}$

2. $\mathrm{sp}, \mathrm{sp}^{2}$ and $\mathrm{sp}^{3}$

3. $\mathrm{sp}^{3}, \mathrm{sp}$ and $\mathrm{sp}^{2}$

4. $\mathrm{sp}^{2}, \mathrm{sp}$ and $\mathrm{sp}^{3}$

Correct Option: , 4

Solution: