Primary amines on heating with $C H {C l}_{3}, K O H$ and $N a O H$ form alkyl isocyanides. This reaction is called:

Hoffmann bromamide reaction

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carbylamine reaction

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Schmidt reaction

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none of these

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Solution

The correct option is B carbylamine reaction
Primary amines on heating with $C H {C l}_{3}, K O H$ or $N a O H$ form foul smelling alkyl isocyanides. The reaction is called Hoffmann's carbylamine test/isocyanide test. This test is not given by secondary and tertiary amines.
$R N H_{2} + C H C l_{3} + 3 K O H Δ - \to R - N C + 3 K C l + 3 H_{2} O$

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The foul smelling substance produced when a primary amine is heated with CHCl₃ and few drops of alcoholic KOH is:

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