The product C in the following sequence of reactions has bonds. [figure]
Answer
4
Solution
[figure]
A = potassium benzoate, B = benzoic acid, C = m-bromobenzoic acid
∵ hot alkaline KMnO4 oxidises the whole side chain (benzylic H present) to –COOK; –COOH is meta-directing, so Br enters meta
bonds in C = 3 (ring C=C) + 1 (C=O) = 4
Answer: 4