Question

In which of the following is the $O-N-O$ bond angle highest ?

• A. $N{O}_2$
• B. $N{O}_2^{+}$
• C. $N{O}_2^{-}$
• D. $N{O}_3^{-}$

Answer 1

Answer: (B)

$N{O}_2^{+}$

${NO}_2^{+}$ is $sp$ and linear i.e. bond angle is ${180}^0$.

${NO}_2$ has a bond angle of ${132}^0$.
${NO}_2^{-}$ is $s{p}^2$ and bond angle is less than ${120}^0$ due to lone pair bond pair repulsion.
${NO}_3^{-}$ is $s{p}^2$ and trigonal planar i.e. bond angle is ${120}^0$