JEE Main Chemistry question

Identify the starting material of the following reaction: A --Mg/Ether--> --(i) CO₂ (ii) H₃O⁺--> a ring bearing –CH₂COOH.

Answer: (C)

Solution

Forming a Grignard reagent requires an organic halide; the final product (ring–CH₂COOH, benzylic acetic acid) arises from

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Question ID VK-149481