Question Detail

CHM 102 Alkenes: Structure, Bonding, and Geometrical Isomerism Objective Question
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Question

What is the product when an alkene is treated with cold, dilute KMnO4?
Options
A Carboxylic acid
B Ketone
C 1,2-diol (glycol)
Correct Answer
D Alkane
Correct Answer

Option C is the correct answer.

Detailed Explanation

Cold, alkaline KMnO4 (or OsO4) adds two OH groups across the double bond via syn addition, forming a vicinal diol (glycol). The purple color disappears, turning brown (MnO2).

Hint

This is a test for unsaturation.

Question Info

Course: CHM 102
Topic: Alkenes: Structure, Bonding, and Geometrical Isomerism
Type: Objective
Difficulty: Not specified
Question 137 of 1999
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