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Aniline reacts with mixed acid (conc. HNO 3 and conc. H 2 SO 4 ) at 288 K to give P (51%), Q (47%) and R (2%). The major product(s) of the following reaction sequence is (are) 1) Ac 2 O, pyridine 2) Br 2 , CH 3 CO 2 H R 3) H 3 O + 4) NaNO 2 , HCl/273-278K 5) EtOH, Δ 1) Sn/HCl 2) Br 2 /H 2 O (excess) S 3) NaNO 2 , HCl/273-278K 4) H 3 PO 2 Major product(s)

1. Br Br Br Br
2. Br Br Br Br
3. Br Br Br
4. Br Br Br Br

Correct answer: Br Br Br Br

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