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NEET2007ChemistryGeneral Organic ChemistryActual

Which of the following amines will not give ( N ₂ ) gas on treatment with nitrous acid ( ( NaNO ₂+ . ) ( HCl ) ) ?

Options

  1. A( C ₂ H ₅ NH ₂ )
  2. B( CH ₃ NH ₂ )
  3. C( ( CH ₃ )₂ CH - NH ₂ )
  4. DAll will give ( N ₂ ).

Correct answer

D. All will give ( N ₂ ).

Step-by-step solution

All aliphatic primary amines liberate ( N ₂ ) gas on treatment with ( HNO ₂ ). (R- NH ₂+ HONO 273-278 ~K R- OH + N ₂+ H ₂ O ) Since no other class of amines liberate ( N ₂ ) gas on treatment with ( HNO ₂ ), this reaction is used as a test for aliphatic primary amines.

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