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MHT CET202615 April 2026Evening ShiftChemistryAminesActual

Which of the following amines is not represented by formula C ₃ H ₉ N ?

Options

  1. A1^ amine
  2. B2^ amine
  3. C3^ amine
  4. Dquaternary ammonium salt

Correct answer

D. quaternary ammonium salt

Step-by-step solution

The molecular formula C ₃ H ₉ N corresponds to saturated acyclic amines. The possible structural isomers are: Primary ( 1^ ) amines: CH ₃ CH ₂ CH ₂ NH ₂ (propan-1-amine) and CH ₃ CH ( NH ₂) CH ₃ (propan-2-amine). Secondary ( 2^ ) amine: CH ₃ CH ₂ NHCH ₃ (N-methylethanamine). Tertiary ( 3^ ) amine: ( CH ₃)₃ N (N,N-dimethylmethanamine). A quaternary ammonium salt requires the nitrogen atom to be bonded to four alkyl groups. The simplest quaternary ammonium salt is the tetramethylammonium ion, which contains four carb

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