Question

Dehydrohalogenation involves removal of the halogen atom together with a hydrogen atom from a carbon atom adjacent to the one with halogen atom. Alcoholic $KOH$ is used for dehydrohalogenation. According to Saytzeff's rule, when two alkenes may be formed, the alkene which is most substituted is the major product.
Question
What are the products of dehydrohalogenation of $2$-iodopentane?

• A. $2$-Pentene (major), $1$-Pentene (minor)
• B. $1$-Pentene (major), $2$-Pentene (minor)
• C. $2$-Pentene $(50\%)$, $1$-Pentene $(50\%)$
• D. None of these

Answer 1

Answer: (A)

Correct answer is (a) $2$-Pentene (major), $1$-Pentene (minor)