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Idea of Hybridisation

Shape of BF...

Question

Shape of ${B F}_{4}^{-}$ is:

Tetrahedral

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Pyramidal

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Trigonal planar

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Bent

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Solution

The correct option is A Tetrahedral
The molecular geometry shape of $B F_{4}^{-}$ is , tetrahedral.
Boron has $3$ valance electrons and each of the four flourides contributes one electron to each covalent bond. The overall negative charge of the molecule contributes another electron.
Thus overall we have $3 + 4 + 1 = 8$ electrons $B F_{4}^{-}$ is given above figure.

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