Among the following species , identify the isostrouctral pairs .
` NF_3, NO_3^-, BF_3 , H_3O^+ , HN_3`

Options

A. ` [NF_3, NO_3^- ] and [ BF_3, H_3 O^+ ]`
B. `[ NF_3 , HN_3]` and `[NO_3^- , BF_3 ]`
C. `[ NF_3 , H_(3)O^(+)]` and `[NO_(3)^(-) , BF_(3) ]`
D. ` [ NF_ 3, H_3 O^+ ]` and `[HN_3 , BF_3 ]`

Answer

C

Explanation

`NF_(3)` and `H_(3)O^(+)` have `sp^(3)-`hybridisation ,
`NO_(3)^(-)` and `BF_(3)` have `sp^(2)`-hybridisation.