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NEET levelSingle correct optionDifficulty 1 of 3nc037

Which of the following gives a positive carbylamine test?

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

Answer: B

The carbylamine test, heating with

CHCl X_{3}

and ethanolic

KOH

, is given only by primary amines (aliphatic or aromatic), which form foul-smelling isocyanides

RNC

. Secondary and tertiary amines do not.

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