Which of the following has the regular tetrahedral structure?

Options

A. `XeF_4`
B. `[Ni(CN)_4]^(2-)`
C. `BF_4^-`
D. `SF_4`

Answer

C

Explanation

Both `XeF_4` and `[Ni(CN)_4]^(-2)` are square planar. In `XeF_4` Xe is `sp^3 d^2` hybridised with 2 lone pairs and Ni in `[Ni(CN)_4]^(2-)` is `dsp^2` hybridised
`SF_4` has a sea- saw shape with S-atom `sp^2d` hybridised with one lone pair.
`BF_4^(-)` has a tetrahedral shape with B-atom `sp^3` hybridised with no lone pair.