Chemistry - Hydrocarbon Question with Solution | TestHub

Explain question : To identify number of hydroxyl groups in final product (Q).

Concept :

This question is based on the dehydration of alcohols to form alkenes and the hydroxylation of alkenes

using dilute alkaline KMnO₄.

Solution :

Step 1: This step is the dehydration of an alcohol, which follows an E1 mechanism.

Step-2: The hydroxylation of alkenes by KMnO₄ is a syn-dihydroxylation reaction, which is a type of

oxidation reaction that converts a carbon-carbon double bond into a vicinal diol (1 1, 2-diol) by adding

two hydroxyl (–OH) groups to the same side of the double bond.