Identify ‘A’, ‘B’ and ‘C’ in following chain reaction and rewrite the chemical reactions:CH3CH2OH —(red ‘P’ / Br2)→ A —(KCN, alc)→ B —(LiAlH4, Ether)→ C

Q.24 Identify ‘A’, ‘B’ and ‘C’ in following chain reaction and rewrite the chemical reactions:
CH₃CH₂OH —(red ‘P’ / Br₂)→ A —(KCN, alc)→ B —(LiAlH₄, Ether)→ C

Doubtly Asked 29 Oct 2026 Board exam · March 2024 hsc 12th Save WhatsApp Report

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Answer: A = ethyl bromide (CH₃CH₂Br), B = ethyl cyanide / propanenitrile (CH₃CH₂CN), C = propan-1-amine (CH₃CH₂CH₂NH₂)

3CH₃CH₂OH + PBr₃ (from red P + Br₂) → 3CH₃CH₂Br (A) + H₃PO₃

CH₃CH₂Br + KCN → (alc., Δ) CH₃CH₂CN (B) + KBr

CH₃CH₂C≡N + 4[H] → (LiAlH₄, ether) CH₃CH₂CH₂NH₂ (C)

Doubtly AI · 29 Oct 2026 AI-generated · not yet verified Report

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Identify ‘A’, ‘B’ and ‘C’ in following chain reaction and rewrite the chemical reactions:CH3CH2OH —(red ‘P’ / Br2)→ A —(KCN, alc)→ B —(LiAlH4, Ether)→ C

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