Question:
The number of species having non–pyramidal shape among the following is_______.
(A) $\mathrm{SO}_{3}$
(B) $\mathrm{NO}_{3}^{-}$
(C) $\mathrm{PCl}_{3}$
(D) $\mathrm{CO}_{3}^{2-}$
Solution:
Hence non-pyramidal species are $\mathrm{SO}_{3}, \mathrm{NO}_{3}^{-}$and
$\mathrm{CO}_{3}^{2-}$