Question

Following is the substitution reaction in which $-CN$ replaces $-Cl$
$R - Cl + \underset{\text{(alcoholic)}}{KCN} \xrightarrow[\Delta]{} R - CN + KCl $
To obtain propanenitrile, $R-Cl$ should be

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

Answer 1

Answer: (A)

$C _{2} H _{5}- Cl + \underset{(alc)}{KCN} \xrightarrow{\Delta} C _{2} H _{5}- CN + KCl$

Hence, to obtain propanenitrile, $R- Cl$ should be chloroethane.