Which one of the following reactions does NOT give benzene as the product ? 1. sodium benzoate (C6H5COONa) with sodalime, heat 2. n-hexane with Mo₂O₃ , 773 K, 10-20 atm 3. H-C≡C-H (ethyne) through red hot iron tube at 873 K 4. benzenediazonium chloride with H₂O , warm

Answer: 4. benzenediazonium chloride with H₂O , warm Key idea: identify the product of each reaction. Sodium benzoate + soda lime, heat: decarboxylation gives benzene. n-Hexane, Mo₂O₃ , 773 K, 10-20 atm: aromatisation gives benzene. Ethyne through red hot iron tube: cyclic trimerisation gives benzene. Benzenediazonium chloride + warm water: hydrolysis gives phenol, not benzene. Option (4).

Topic: Classification, isomerism, nomenclature, preparation· Hydrocarbons

Which one of the following reactions does NOT give benzene as the product ?

Four reactions: sodium benzoate + sodalime/heat; n-hexane Mo2O3 773K 10-20 atm; ethyne red hot iron tube 873 K; benzenediazonium chloride + H2O warm

1. sodium benzoate (C6H5COONa) with sodalime, heat

2. n-hexane with \(\mathrm{Mo_2O_3}\), 773 K, 10-20 atm

3. H-C≡C-H (ethyne) through red hot iron tube at 873 K

4. benzenediazonium chloride with \(\mathrm{H_2O}\), warm

Doubtly Asked 30 Oct 2026 NEET UG 2025 Practice test neet Save WhatsApp Report

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Answer: 4. benzenediazonium chloride with \(\mathrm{H_2O}\), warm

Key idea: identify the product of each reaction.

Sodium benzoate + soda lime, heat: decarboxylation gives benzene.
n-Hexane, \(\mathrm{Mo_2O_3}\), 773 K, 10-20 atm: aromatisation gives benzene.
Ethyne through red hot iron tube: cyclic trimerisation gives benzene.
Benzenediazonium chloride + warm water: hydrolysis gives phenol, not benzene.

Option (4).

Doubtly AI · 30 Oct 2026 AI-generated · not yet verified Report

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Which one of the following reactions does NOT give benzene as the product ?

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