JEE Main Chemistry question

Primary, secondary and tertiary amines can be distinguished by

(A)Hinsberg's reagentCorrect
(B)Grignard reagent
(C)Fehling's solution
(D)Tollen's reagent

Answer: (A)

Solution

Hinsberg's reagent (benzenesulphonyl chloride, with aqueous KOH) gives a characteristic, class-specific outcome for each type of amine — an alkali-soluble sulphonamide

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Question ID VK-150450