JEE Main Chemistry question

Identify the final product (D) of the reaction: Benzene --Br₂/FeBr₃--> A --Mg/Ether--> B --(i) Dry ice (ii) H₃O⁺--> C --HNO₃(conc.) + H₂SO₄(conc.)--> D.

(A)2-Nitrobenzoic acid
(B)3-Nitrobenzoic acidCorrect
(C)4-Nitrobenzoic acid
(D)2,4-Dinitrobenzoic acid

Answer: (B)

Solution

Bromination of benzene gives bromobenzene (A); forming the Grignard reagent (B) and reacting with dry ice (CO₂), then acidic workup, gives benzoic acid (C). Nitration of benzoic acid: the –COOH group is a

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Question ID VK-149475