Question

Which one of the following forms propanenitrile as the major product?

• A. Propyl bromide + alcoholic $KCN$
• B. Ethyl bromide + alcoholic $KCN$
• C. Ethyl bromide + alcoholic $AgCN$
• D. Propyl bromide + alcoholic $AgCN$

Answer 1

Answer: (B)

Ethyl bromide + alcoholic $KCN$

Answer 2

When ethyl bromide reacts with alcoholic KCN, propane nitrile is obtained as main product.

$C _{2} H _{5} Br + Alc . KCN \longrightarrow \underset{\text{propane nitrile}}{C _{2} H _{5} CN}$