Question

Which of the following alkynes gives a single ketone in an acid-catalyzed hydration?

A. Propyne
B. Butyne
C. Pent-1-yne
D. Hex-1-yne

Answer 1

The alkynes that give a single ketone in an acid-catalyzed hydration are propyne, butyne, pent-1-yne, and hex-1-yne.

Step-by-step explanation:

The alkynes that give a single ketone in an acid-catalyzed hydration are A. Propyne, B. Butyne, C. Pent-1-yne, and D. Hex-1-yne. When alkynes undergo acid-catalyzed hydration, they first form an enol intermediate, which contains a C=C double bond and an -OH group.

This enol intermediate then undergoes tautomerization to form the corresponding ketone.