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Standard XII

Chemistry

Nucleophilic Addition at the Carbonyl

Assertion :Al...

Question

Assertion :Alkyl cyanide can be prepared by carbylamine reaction Reason: Ethyl amine when heated with chlorofrom in presence of alcoholic KOH, cyanide is formed

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Both Assertion and Reason are incorrect

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Solution

The correct option is D Both Assertion and Reason are incorrect
When primary amines are heated with chloroform in the presence of alcoholic KOH, isocyanides are formed. This reaction is known as carbymine reaction. eg. ethyl amine fives ethyl isocyanide on treatment with $C H C l_{3}$ and alcoholic KOH.
$C_{2} H_{5} - N H_{2} E t h y l a m i n e + C H C l_{3} C h l o r o f o r m + 3 K O H (a l c) △ \to$
$C_{2} H_{5} - N = C + 3 K C l + 3 H_{2} O$

Hence both Assertion and Reason are incorrect

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