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Butanenitrile is formed by the reaction of KCN with

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Propyl alcohol

Butyl chloride

Butyl alcohol

Propyl chloride

answer is D.

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Detailed Solution

Given data : It is given to identify Butanenitrile from a compound by the reaction of $K C N$ .

Explanation:

Propyl chloride is supposed to be heated with $K C N$ to prepare butanenitrile.

The chemical reaction is as follows.
$C H_{3} - C H_{2} - C H_{2} - C l \to_{K C N}^{S_{N} 2} C H_{3} - C H_{2} - C H_{2} - C N$
In the above chemical reaction, the chloride ion is replaced by a cyanide ion through $S_{N} 2$ reaction.

Hence, the correct aoption (D).Propyl chloride

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