An alkyl halide, $R X$ reacts with $K C N$ to give propane nitrile is :

C_{3} H_{7} B r

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C_{4} H_{9} B r

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C_{2} H_{5} B r

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C_{5} H_{11} B r

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Solution

The correct option is C $C_{2} H_{5} B r$
$K C N$ is predominantly ionic and provides cyanide ions in its solution. In the presence of alcoholic KCN alkyl halides gives alkyl cyanides.
$C_{2} H_{5} B r$ + $K C N$ $\to$ $C_{2} H_{5} C N + K B r$
So, $R X$ reacts with $K C N$ to give propane nitrile is $C_{2} H_{5} B r$ .

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An alkyl halide, RX reacts with KCN to give propane nitrile is :

The correct option is C C2H5BrKCN is predominantly ionic and provides cyanide ions in its solution. In the presence of alcoholic KCN alkyl halides gives alkyl cyanides. C2H5Br + KCN → C2H5CN+KBrSo, RX reacts with KCN to give propane nitrile is C2H5Br.

An alkyl halide, $R X$ reacts with $K C N$ to give propane nitrile is :