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Question

Which of the following species cannot exist?
$[B F_{6}]^{3 -}$
$[A l F_{6}]^{3 -}$
$[G a F_{6}]^{3 -}$
$[I n F_{6}]^{3 -}$

A

[A l F_{6}]^{3 -}

B

[B F_{6}]^{3 -}

C

[G a F_{6}]^{3 -}

D

[I n F_{6}]^{3 -}

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Solution

Verified by Toppr

$B^{3 +}$ , being small in size, does not have empty d-orbitals like other atoms to accommodate 6 electron pairs of 6 $F^{-}$ ions.

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