JEE Main Chemistry question

Which of the following reagents would be useful as the basis for a simple chemical test to distinguish between -toluidine, , and benzylamine, ?

(A) and in (Hinsberg test)
(B), then -naphthol (diazotisation/coupling, the "dye test")Correct
(C)Dilute HCl
(D) in

Answer: (B)

Solution

Both compounds are primary amines, so the Hinsberg test (a) would give a similarly soluble sulfonamide for each and would not distinguish them, and both dissolve in dilute HCl (c) and are unaffected by (d), so neither of those distinguishes them either. The dye test, however, does: -toluidine (a

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Question ID VK-150360