The following is a substitution reaction in which $-CN$ replaces $-Cl$:
$R-Cl \xrightarrow[\text{alcoholic}]{KCN, \Delta} R-CN + KCl$
To obtain propanenitrile,$R-Cl$ should be:

  • A
    chloroethane
  • B
    $1-$chloropropane
  • C
    chloromethane
  • D
    $2-$chloropropane

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