Question

Which of the following has largest bond angle?

• A. ${NO}_2^{+}$
• B. ${NO}_2$
• C. ${NO}_2^{-}$
• D. ${NO}_3^{-}$

Answer 1

The correct option is A ${NO}_2^{+}$

In ${NO}_2^{+}$ molecule, there is no lone pair, only bond pair are present. So the molecule is linear & so the bond angle is $180°$.

While in ${NO}_2^{-}$ & ${NO}_2$, we have one lone pair on nitrogen & one lone electron respectively which cause repulsion leading to angle less than $180°$. In ${NO}_3^{-}$, the bond angle is $120°$