Question

Identify the molecule/ion with the greatest potential to act as a Lewis acid.

• A. ${}^{+}C{H}_3$
• B. ${}^{-}CN$
• C. $C{O}_2$
• D. ${B{F}_4}^{-}$

Answer 1

The correct option is A ${}^{+}C{H}_3$

A Lewis acid is a species which accepts an electron pair in aqueous solutions. This species can be electron deficient thus allowing itself to accept electron pair.

From the given options, ${}^{+}C{H}_3$ is the only electron deficient species.

Hence, ${}^{+}C{H}_3$ ion will have the greatest potential to act as a Lewis acid.