Which of the following intermediates is thought to occur in the mechanism by which alkenes are hydrated in the presence of acid?

A) carbanion
B) carbocation
C) free radical
D) carbene
E) alkyne

Carbanion

A negatively charged ion (anion) that consists of a carbon atom having a pair of non-bonded electrons.

Free Radical

Highly reactive atoms or molecules with an unpaired electron, involved in various chemical reactions.

Carbene

A highly reactive molecule featuring a carbon atom with two non-bonded electrons, making it very reactive.