Which of the following has regular tetrahedral shape ?

I_{3}^{-}

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S F_{4}

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[B F_{4}]^{-}

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X e F_{4}

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Solution

The correct option is C $[B F_{4}]^{-}$
In $[B F_{4}]^{-}$ , the central boron atom has $4$ bond pairs of electrons and zero lone pairs of electrons.

Hence, it undergoes $s p^{3}$ hybridization which results in a tetrahedral geometry.

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