Question

Which of the following are non-planar species?
$N{O}_3^{-},As{O}_3^{3-},C{O}_3^{2-},Cl{O}_3^{-},S{O}_3^{2-},B{O}_3^{3-}$

• A. $C{O}_3^{2-},S{O}_3^{2-},B{O}_3^{3-}$
• B. $As{O}_3^{3-},Cl{O}_3^{-},S{O}_3^{2-}$
• C. $N{O}_3^{-},C{O}_3^{2-},B{O}_3^{3-}$
• D. $S{O}_3^{2-},N{O}_3^{-},B{O}_3^{3-}$

Answer 1

The correct option is B $As{O}_3^{3-},Cl{O}_3^{-},S{O}_3^{2-}$

$$\begin{array}{cccc}\text{Species}& \text{Hybridisation}& \text{Shape}& \text{Number of lone pairs}\\ N{O}_3^{-}& s{p}^2& \text{Trigonal planar}& 0\\ As{O}_3^{3-}& s{p}^3& \text{Pyramidal}& 1\\ C{O}_3^{2-}& s{p}^2& \text{Trigonal planar}& 0\\ Cl{O}_3^{-}& s{p}^3& \text{Pyramidal}& 1\\ S{O}_3^{2-}& s{p}^3& \text{Pyramidal}& 1\\ B{O}_3^{3-}& s{p}^2& \text{Trigonal planar}& 0\end{array}$$