Question

Which o f the following species are Lewis acids? (I) $O{H}^{-}$ (II) $F^{-}$ (III) $H^{+}$ (IV) $BC{l}_3$

• A. (I) and (II)
• B. (III) and (IV)
• C. (II) and (IV)
• D. (I), (II) and (IV)

Answer 1

Answer: (B)

$H^{+}$ and $BC{l}_3$ are Lewis acids because they act as electron pair acceptors but $O{H}^{-}$ and $F^{-}$ are Lewis bases be cause they act as electron pair donors