Among the following species, identify the isostuctural pairs
`NF_(3). NO_(3)^(-), BF_(3), H_(3)O, HN_(3)`

Options

A. `[NF_(3),NO_(3)^(-)]` and `[BF_(3),H_(3)O^(+)]`
B. `[NF_(3),H_(3)O^(+)]` 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_(2)O^(+)` are pyramidal, `NO_(3)^(-)` and `BF_(3)` are triangular planar.
`{:(" "ddot(N) " " ddot(O^(+))),(" / | \ / | \"),(" F F F H H H"),(),(" O F"),(" "uarr" "|),(" N B"),(" / \\ / \"),(" "O^(-)" O F F"):}`