JEE Main Chemistry question

[IIT 1999] A positive carbylamine (isocyanide) test is given by

(A)*N*,*N*-Dimethylaniline
(B)2,4-DimethylanilineCorrect
(C)*N*-Methyl-*o*-methylaniline
(D)*p*-MethylbenzylamineCorrect

Answer: (B),(D)

Solution

The carbylamine test is specific to primary amines (–NH₂ with no substituent on nitrogen), whether aromatic-ring-bound or benzylic. *N*,*N*-dimethylaniline (tertiary N) and *N*-methyl-*o*-methylaniline

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Question ID VK-140260