Question

Fluorobenzene can be synthesized in the laboratory by ____.

• A. heating phenol with HF and KF
• B. diazotization of aniline followed by heating with HBF₄
  
• C. direct fluorination of benzene using fluorine gas
• D. reacting bromobenzene with NaF solution

Answer 1

The correct option is B diazotization of aniline followed by heating with HBF₄


Synthesis of fluorobenzene from aniline is called Schiemann reaction (or Balz Schiemann reaction) where a primary aromatic amine is transformed to an aryl fluoride via a diazonium tetrafluoroborate intermediate.