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MHT CET202615 April 2026Morning ShiftChemistryAminesActual

Identify Hinsberg's reagent from following.

Options

  1. Abenzene sulfonic acid
  2. Bbenzene sulphonyl chloride
  3. Cp-toluene sulphonyl chloride
  4. Dchlorosulphuric acid

Correct answer

B. benzene sulphonyl chloride

Step-by-step solution

Hinsberg's reagent is benzene sulphonyl chloride ( C₆H₅SO₂Cl ). It is used to distinguish between primary, secondary, and tertiary amines. Primary amines react with it to form a precipitate that is soluble in alkali. Secondary amines react to form a precipitate that is insoluble in alkali. Tertiary amines do not react with it.

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