Which of the following are Lewis acids: PH_3,BCl_3,AlCl_3,SiCl_4. - Vidyadip

Question

Which of the following are Lewis acids:
$\text{PH}_3,\text{BCl}_3,\text{AlCl}_3,\text{SiCl}_4.$

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Answer

$\mathrm{BCl}_3$ and $\mathrm{AlCl}_3$ are Lewis acid because their octet is not complete.

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