Question

$KCN$ reacts readily to give a cyanide with

• A. ethyl alcohol
• B. ethyl bromide
• C. bromobenzene
• D. chlorobenzene

Answer 1

Answer: (B)

Ethyl bromide reacts with $KCN$ to give ethyl cyanide,
$\underset{\text{ethyl bromide}}{C_2{H}_{5}Br}+KCN(alc.)\to \underset{\text{ethyl cyanide}}{C_2{H}_{5}CN}+KBr$