Exams › JEE Main › Chemistry

Identify A and B in the following reaction sequence. Bromobenzene Conc. HNO3 / Conc. H2SO4 A (i) NaOH (ii) HCl B

1. A = 2,4,6-trinitrobromobenzene; B = 2,4,6-trinitrophenol
2. A = p-bromonitrobenzene; B = p-nitrophenol
3. A = nitrobenzene; B = bromophenol
4. A = o-bromonitrobenzene; B = 2-bromoresorcinol

Correct answer: A = p-bromonitrobenzene; B = p-nitrophenol

Solution

The reaction of bromobenzene with concentrated nitric and sulfuric acids leads to the nitration of the aromatic ring, resulting in p-bromonitrobenzene as the product A. The subsequent treatment with NaOH followed by HCl converts the nitro group into a phenolic group, yielding p-nitrophenol as product B.

Related JEE Main Chemistry questions

• Why is the chlorine atom in vinyl chloride comparatively less reactive?
• What is the product obtained when neopentyl bromide undergoes the Wurtz reaction?
• Which of the following reactions is most likely to produce a hydrocarbon in high yield with ease?
• Which of the following reactions proceeds by an S_N2 mechanism?
• Identify the incorrect statement among the following:
• An alkyl chloride A with molecular formula C4H9Cl is treated with sodium in dry ether. The hydrocarbon formed in this reaction yields only one monochloro product on chlorination. Identify A.

⚔️ Practice JEE Main Chemistry free + battle 1v1 →