Question

The statement true for $N_3^{-}$ is

• A. it has a non‐linear structure
• B. it is called pseudohalogen
• C. the formal oxidation state of nitrogen in this anion is + 1
• D. it is isoelectronic with $N{O}_2$

Answer 1

Answer: (C)

The electronic structure of azide ion $\left(N_3^{-}\right)$is a resonance hybrid of the following structure

Thus $N_3^{-}$ion has a linear symmetrical structure, since all atoms lie in a straight line. $N_3^{-}$is iso-electronic with $N_{2}O$ (22e ${}^{-}$)