Nitration of nitrobenzene at 125^ C with mixed acids gives [J & K CET 2008]

JEE Main Chemistry question

Nitration of nitrobenzene at with mixed acids gives [J & K CET 2008]

(A)-dinitrobenzeneCorrect
(B)-dinitrobenzene
(C)-dinitrobenzene
(D)1,3,5-trinitrobenzene

Answer: (A)

Solution

The nitro group already present on the ring is strongly deactivating and meta-directing. A second nitration (with hot, concentrated mixed acid) therefore introduces the new group at the meta position relative to the first, giving

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Question ID VK-150192