Question

Amongest $N{O}_3^{-},As{O}_3^{3-}C{O}_3^{2-},Cl{O}_3^{-},S{O}_3^{2-}$ and $B{O}_3^{3-}$, the non - planar species are:

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

Answer 1

Answer: (B)

$As{O}_3^{3-},Cl{O}_3^{-}$ and $S{O}_3^{2-}$

$As{O}_3^{3-},Cl{O}_3^{-}$ and $S{O}_3^{2-}$ are non - planar species.

In these species, the central atom has $s{p}^3$ hybridization due to presence of $3$ bonding domains and one lone pair of electrons. The molecular geometry is pyramidal and the electronic geometry is tetrahedral.