Which of the following are Lewis acids?

Which of the following are Lewis acids?

${BCl}_{3}$ and ${AlCl}_{3}$
${PH}_{3}$ and ${BCl}_{3}$
${AlCl}_{3}$ and ${CCl}_{4}$
${PH}_{3}$ and ${CCl}_{4}$

Solution

Both

{BCl}_{3} and {AlCl}_{3}

have vacant

p -

orbital and incomplete octet. So they accept lone pair and act as Lewis acids.

Asked in: JEE Main 2018 (08 Apr)

Practice more Ionic Equilibria questions on Aicharya