JEE Main · 2014 · 06 Apr 2014 · Offline · Compounds Containing Nitrogen

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On heating an aliphatic primary amine with chloroform and ethanolic potassium hydroxide, the organic compound formed is:

(A)an alkyl cyanide
(B)an alkyl isocyanide✓ Correct
(C)an alkanol
(D)an alkanediol

Answer: (B)

Solution

Heating a primary amine with chloroform and alcoholic potassium hydroxide is the carbylamine test. The amine is turned into a foul-smelling alkyl isocyanide,

RNC

, by

RNH X_{2} + CHCl X_{3} + 3 KOH RNC + 3 KCl + 3 H X_{2} O

. Only primary amines give this, so the compound formed is an alkyl isocyanide.

JEE Main · 2014 · 06 Apr 2014 · Offline · Single correct option

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