Which of the following amine does not respond to carbylamine reaction?

Ethylamine

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{({C H}_{3})}_{2} N H

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{C H}_{3} {N H}_{2}

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Phenylamine

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Solution

The correct option is D ${({C H}_{3})}_{2} N H$
Dimethylamine, a secondary amine does not respond to carbylamine reaction.
Carbylamine reaction can be used to identify primary amino group in a given organic compound.
When primary amines are treated with chloroform and alcoholic KOH, they give isocyanides (carbylamines) having very unpleasant smell which can be easily detected.
$R N H_{2} + C H C l_{3} + 3 K O H \to R N C + 3 K C l + 3 H_{2} O$

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