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MHT CET202525 Apr 2025Evening ShiftChemistryAminesActual

Which from following amines on heating with chloroform and ethanolic potassium hydroxide produces foul smell?

Options

  1. A( CH ₃ )₃ ~N
  2. B( CH ₃ )₂ NH
  3. C( CH ₃ CH ₂ )₂ NH
  4. DCH ₃ CH ₂ NH ₂

Correct answer

D. CH ₃ CH ₂ NH ₂

Step-by-step solution

The Carbylamine reaction occurs specifically with primary amines, forming isocyanides that produce a foul odor. The general equation is: R-NH₂ + CHCl₃ + 3KOH (alc) heat R-NC + 3KCl + 3H₂O Analysis of the compounds: Option A, ( CH ₃ )₃ N , is a tertiary amine and does not react. Option B, ( CH ₂ )₂ NH , is a secondary amine and does not react. Option C, ( CH ₃ CH ₂ )₂ NH , is a secondary amine and does not react. Option D, CH ₃ CH ₂ NH ₂ , is a primary amine, undergoes the reaction, and produces the foul-smelling et

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