Question Detail

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

Question

What is the characteristic color change when an alkene reacts with cold KMnO4?
Options
A Orange to green
B Purple to brown
Correct Answer
C Colorless to purple
D Brown to colorless
Correct Answer

Option B is the correct answer.

Detailed Explanation

Cold, dilute KMnO4 (purple) is reduced to MnO2 (brown) when it reacts with an alkene, indicating unsaturation (Baeyer's test).

Hint

Test for double bonds.

Question Info

Course: CHM 102
Topic: Alkenes: Structure, Bonding, and Geometrical Isomerism
Type: Objective
Difficulty: Not specified
Question 157 of 1999
Previous Course Details Next