Which of the following molecule/species is having maximum number of lone pairs in Lewis-dot structure?

B H_{4}^{-}

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B F_{4}^{-}

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C N^{-}

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C O C l_{2}

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Solution

The correct option is B $B F_{4}^{-}$

The Lewis dot structures of the given species are shown in the figure. The no. of lone pairs are :
$B H_{4}^{-} = 0$
$B F_{4}^{-} = 12$
$C N^{-} = 2$
$C O C l_{2} = 8$

Hence, the maximum no. of lone pairs are in $B F_{4}^{-}$ . Option B is correct.

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