question_answer

Some of the properties of the two species, \[\text{NO}_{\text{3}}^{\text{-}}\]and \[{{\text{H}}_{\text{3}}}\text{O}_{{}}^{+}\] 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 hybridization for the central atom

D)  Similar in hybridisation for the central atom with different structures

Correct Answer: A

Solution :

In\[N{{O}_{3}}\], \[H=\frac{1}{2}[5+0-0+1]=3\] Thus, in \[\text{NO}_{3}^{-},\] the central atom is sp2 hybridized and it has trifocal planar geometry. In \[{{\text{H}}_{\text{3}}}{{\text{O}}^{\text{+}}},\]                         \[H=\frac{1}{2}[6+3-1+0]=4\]              Thus, O is sp3 hybridised in \[{{\text{H}}_{\text{3}}}{{\text{O}}^{\text{+}}}\] and \[{{\text{H}}_{\text{3}}}{{\text{O}}^{\text{+}}}\] has pyramidal geometry due to the presence of one lone pair of electrons.