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When a tertiary aliphatic amine such as is shaken with benzenesulfonyl chloride and aqueous alkali, it

  1. Adoes not form a sulfonamide (no reaction)
  2. Bforms a sulfonamide soluble in alkali
  3. Cforms a sulfonamide insoluble in alkali
  4. Dforms a diazonium salt

Answer: A

A sulfonamide is formed only if the nitrogen carries a replaceable hydrogen. A tertiary amine has none, so no sulfonamide forms (Hinsberg test: no reaction).
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