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Question

A positive carbylamine test is given by:


A
N,N-dimethyl aniline
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B
isopropyl amine
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C
diethyl amine
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D
trimethyl amine
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Solution

The correct option is D isopropyl amine
Carbylamine reaction is given by primary amines. It is not given by secondary or tertiary amines.
Isopropyl amine is a primary amine. it can give positive carbylamine test.
In Hoffmann's carbylamine test (also known as Isocyanide test), aliphatic or aromatic primary amine is heated with chloroform  in presence of alcoholic potassium hydroxide to give foul smelling alkyl/aryl  isocyanide or carbylamine.
$$ { i-C_3H_7-NH_2} + CHCl_3  + 3KOH  \xrightarrow {heat} i-C_3H_7-NC  + 3KCl + 3H_2O$$

Chemistry

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