Question

Which of the following is a lewis acid?

• A. $AlCl_{3}$
• B. $MgCl_{2}$
• C. $CaCl_{2}$
• D. $BaCl_{2}$

Answer 1

Answer: (A)

$AlCl_{3}$

Answer 2

: $AlCl_{3}$ is an electron deficient molecule, it has tendency to accept a pair of electrons to achieve stable electronic configuration and thus, behaves as a Lewis acid.