Question

Alkaline $KMn{O}_4$ (Baeyer's reagent) can be used to test unsaturation in(A).
In this case

• A. unsaturation in side-chain is affected.
• B. unsaturation in benzene uncleus is affected.
• C. unsaturation in both is affected.
• D. Baeyer's reagent cannot be used.

Answer 1

Answer: (A)

unsaturation in side-chain is affected.

Here only side chain usaturated part reacts with Baeyer reagent.
Benzene's unstaurated part doesnt take part in reaction because of resonance. As benzene is most stable (aromatic).