Question
Chemistry Question on Organic Chemistry- Some Basic Principles and Techniques
Which of the following is Baeyer’sreagent?
A
(A) Acidified KMnO4
B
(B) Alkaline KMnO4
C
(C) Acidified K2Cr2O7
D
(D) Aqueous KMnO4
Answer
(B) Alkaline KMnO4
Explanation
Solution
Explanation:
Alkaline KMnO4 is called Baeyer's reagent. Baeyer's reagent is an alkaline solution of cold potassium permanganate, which is a powerful oxidant making this a redox reaction. Reaction with double or triple bonds (−C=C− or −C≡C−) in an organic material causes the colour to fade from purplish-pink to brown. It is a syn addition reaction. Hence, the correct option is (B).