Answer
The substitution product is $CH_3(CH_2)_4CH_2-CN$
Work Step by Step
When 1-bromohexane ( $CH_3(CH_2)_4CH_2Br$ ) reacts with $KCN$, the $-Br$ is substituted with $-CN$. The substitution product is $CH_3(CH_2)_4CH_2-CN$
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.