Question

Strongest Lewis acid among the following is

• A. $N{F}_3$
• B. $PC{l}_3$
• C. $SnC{l}_4$
• D. $PbC{l}_2$

Answer 1

Answer: (D)

Lewis concept: According to this concept An acid is a substance which can accept a pair of electrons whereas a base is a substance which can furnish a pair of electrons to form a coordinate bond. In $PbC{l}_2$, lead is most electron deficient due to inert pair effect. Therefore, $PbC{l}_2$ is strongest Lewis acid.