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NEET2007ChemistryAminesActual

Which of the following statement is true?

Options

  1. ATrimethyl amines form a soluble compound with Hinsberg reagent and ( KOH ).
  2. BDimethylamines react with ( KOH ) and phenol to form an azo dye.
  3. CMethylamine reacts with nitrous acid and liberates ( N ₂ ) from aq. soln.
  4. DNone of these.

Correct answer

C. Methylamine reacts with nitrous acid and liberates ( N ₂ ) from aq. soln.

Step-by-step solution

Aliphatic (1^ ) amines react with cold nitrous acid to give alcohols with quantitative evolution of ( N ₂ ) gas. ( Methylamine CH ₃ NH ₂ + HONO 273-278 ~K CH ₃ OH + N ₂+ H ₂ O ) This reaction is used as a test for aliphatic primary amines.

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