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NEET2026ChemistryHaloalkanes and HaloarenesActual

The following two reactions give the same foul smelling product Z. C ₂ H ₅ Cl X Z C ₂ H ₅ CONH ₂ Br ₂, NaOH Y [ ] CHCl ₃/ ethanolic KOH Z X and Z, respectively, are :

Options

  1. AX = AgCN ; Z = C ₂ H ₅ NC
  2. BX = KCN ; Z = C ₂ H ₅ CN
  3. CX = AgCN ; Z = C ₂ H ₅ CN
  4. DX = KCN ; Z = C ₂ H ₅ NC

Correct answer

A. X = AgCN ; Z = C ₂ H ₅ NC

Step-by-step solution

In the second sequence of reactions, C ₂ H ₅ CONH ₂ undergoes Hoffmann bromamide degradation with Br ₂ and NaOH to form a primary amine with one less carbon atom. Thus, Y is ethylamine ( C ₂ H ₅ NH ₂ ). Ethylamine ( Y ) then reacts with CHCl ₃ and ethanolic KOH in a carbylamine reaction to form ethyl isocyanide ( C ₂ H ₅ NC ), which is known for its foul smell. Therefore, Z is C ₂ H ₅ NC . In the first reaction, ethyl chloride ( C ₂ H ₅ Cl ) reacts with a reagent X to give the same product Z ( C ₂ H ₅ NC ). To obta

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