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NEET levelSingle correct optionDifficulty 1 of 3nc185

Which of the following gives the carbylamine test (foul-smelling isocyanide with $CHCl X_{3} + KOH$ )?

A $C X_{6} H X_{5} CH X_{2} NH X_{2}$
B $(CH X_{3}) X_{2} NH$
C $(CH X_{3}) X_{3} N$
D $C X_{6} H X_{5} NHCH X_{3}$

Answer: A

Only primary amines (aliphatic or aromatic) give the carbylamine test. Benzylamine is primary; the other three are secondary or tertiary.

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