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Q.
Which of the following halides is the most acidic ?
The p-Block Elements - Part2
Solution:
$CCI_4$ cannot accept a lone pair of electron. As such it is not a Lewis acid. Acid strength of trichlorides is in the order
$PCl_3 > AsCl_3 > SbCl_3$
Thus $PCl_3$ is more acidic than $SbCl_3$