Question

Fluorobenzene $\left(C_6{H}_{5}F\right)$ can be synthesized in the laboratory:

• A. By heating phenol with $HF$ and $KF$
• B. From aniline by diazotization, followed by heating the diazonium salt with $HB{F}_4$
• C. By direct fluorination of benzene with $F_2$ gas
• D. By reacting bromobenzene with $NaF$ solution

Answer 1

The correct option is B From aniline by diazotization, followed by heating the diazonium salt with $HB{F}_4$

Bromobenzene can not undergo substitution reaction with $NaF$ to form fluorobenzene.
The reactions is as shown.

Hence, option $B$ is correct.