1. mathrmCH₃CONH₂ xrightarrow[(ii)\ H₃O^(oplus)](i)\ LiAlH₄ Product 2. mathrmCH₃CONH₂ xrightarrowBr₂/KOH Product 3. mathrmCH₃CN xrightarrow[(ii)\ H₃O^(oplus)](i)\ LiAlH₄ Product 4. mathrmCH₃NC xrightarrow[(ii)\ H₃O^(oplus)](i)\ LiAlH₄ Product

Answer: 4. mathrmCH₃NC xrightarrow[(ii)\ H₃O^(oplus)](i)\ LiAlH₄ Product Key idea: Find which reaction does not give R-NH₂ . 1: LiAlH₄ reduces the amide to ethylamine, primary. 2: Hofmann bromamide gives methylamine, primary. 3: LiAlH₄ reduces the nitrile to ethylamine, primary. 4: reduction of the isocyanide CH₃NC gives N-methylmethanamine, CH₃NHCH₃ , a secondary amine. Option 4.

Topic: Amines: nomenclature, classification, structure, preparation· Organic Compounds Containing Nitrogen

Which of the following reactions will NOT give primary amine as the product?

1. \(\mathrm{CH_3CONH_2 \xrightarrow[(ii)\ H_3O^{\oplus}]{(i)\ LiAlH_4} Product}\)

2. \(\mathrm{CH_3CONH_2 \xrightarrow{Br_2/KOH} Product}\)

3. \(\mathrm{CH_3CN \xrightarrow[(ii)\ H_3O^{\oplus}]{(i)\ LiAlH_4} Product}\)

4. \(\mathrm{CH_3NC \xrightarrow[(ii)\ H_3O^{\oplus}]{(i)\ LiAlH_4} Product}\)

Doubtly Asked 30 Oct 2026 NEET UG 2023 Practice test neet Save WhatsApp Report

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Answer: 4. \(\mathrm{CH_3NC \xrightarrow[(ii)\ H_3O^{\oplus}]{(i)\ LiAlH_4} Product}\)

Key idea: Find which reaction does not give \(\mathrm{R-NH_2}\).

1: \(\mathrm{LiAlH_4}\) reduces the amide to ethylamine, primary.
2: Hofmann bromamide gives methylamine, primary.
3: \(\mathrm{LiAlH_4}\) reduces the nitrile to ethylamine, primary.
4: reduction of the isocyanide \(\mathrm{CH_3NC}\) gives N-methylmethanamine, \(\mathrm{CH_3NHCH_3}\), a secondary amine.

Option 4.

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

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Which of the following reactions will NOT give primary amine as the product?

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