Question

Identify the use of Baeyer's reagent by the following.

• A. Detecting the presence of carbon carbon double bond.
• B. Polymerisation
• C. Oxidation
• D. Reduction

Hint:

Baeyer reagent is cold dilute alkaline KMnO4, used in the test for unsaturation.

Answer 1

The Correct Option is A

Step 1: Observation
On adding Baeyer's reagent to an alkene, the purple colour disappears and a brown MnO2 precipitate forms.

Step 2: Meaning
This confirms unsaturation, option (A).

Final Answer:
Test for C=C. \[ \boxed{\text{(A)}\ \text{Detecting C=C bond}} \]