Which of the following reactions is a nucleophilic substitution reaction?

CHEMISTRY · Single correct · A Level · Chemistry · Halogenoalkanes · Halogenoalkanes

Problem

Which of the following reactions is a nucleophilic substitution reaction? (1)

\text{CH}_3\text{CH}_2\text{OH} + 2[\text{O}] \rightarrow \text{CH}_3\text{COOH} + \text{H}_2\text{O}

(2)

\text{C}_2\text{H}_4 + \text{HBr} \rightarrow \text{CH}_3\text{CH}_2\text{Br}

(3)

\text{C}_6\text{H}_6 + \text{HNO}_3 \rightarrow \text{C}_6\text{H}_5\text{NO}_2 + \text{H}_2\text{O}

(4)

\text{CH}_3\text{CH}_2\text{CH}_2\text{Br} + \text{OH}^- \rightarrow \text{CH}_3\text{CH}_2\text{CH}_2\text{OH} + \text{Br}^-