MHT CET 2022 Chemistry question

Which among the following reagents is used to distinguished primary, secondary and tertiary amines according to solubility on alkaline medium?

(A)Benzenesulphonyl chlorideCorrect
(B)Ethylene glycol
(C)Iodoform
(D)Acetyl chloride

Answer: (A)

Solution

This is the Hinsberg test, which uses benzenesulphonyl chloride (, Hinsberg's reagent) in aqueous alkali. A primary amine gives , which still has an acidic N-H hydrogen, so it dissolves in the alkali as its sodium salt. A secondary amine gives , which has no acidic hydrogen

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Question ID VK-093983