Question

Some of the properties of the two species, $NO _{3}^{-}$and $H _{3} O ^{+}$are described below. Which one of them is correct?

• A. Dissimilar in hybridisation for the central atom with different structures
• B. Isostructural with same hybridisation for the central atom
• C. Isostructural with different hybridisation for the central atom
• D. Similar in hybridisation for the central atom with different structures

Answer 1

Answer: (A)

Dissimilar in hybridisation for the central atom with different structures

Answer 2

In $NO _{3}^{-}$
$H=\frac{1}{2}[5+0-0+1]=3$
Thus, in $NO _{3}^{-}$, the central atom is $s p^{2}$ hybridised and it has trigonal planar geometry.

In $H _{3} O ^{+}$
$H=\frac{1}{2}[6+3-1+0]=4$
Thus, $O$ is $s p^{3}$ hybridised in $H _{3} O ^{+}$and $H _{3} O ^{+}$ has pyramidal geometry due to the presence of one lone pair of electrons.