Fluorobenzene ( C_6H_5F ) can be synthesized in the laboratory: - Chemistry MCQ AIEEE 2006 2026 | ExamTest.live

easyMCQAIEEE 20062026Chemistry

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Fluorobenzene (C_{6} H_{5} F) can be synthesized in the laboratory:

A $by heating phenol with HF and KF$
B $from aniline by diazotisation followed by heating the diazonium salt with HBF_{4}$
C $by direct fluorination of benzene with F_{2} gas$
D $by reacting bromobenzene with NaF solution$

Solution & Step-by-step Explanation

This is known as the Schiemann reaction.Aniline is reacted with NaNO_{2} and HCl to form the diazonium salt.Treatment with fluoroboric acid (HBF_{4}) gives benzene diazonium fluoroborate.Heating the dry fluoroborate salt yields fluorobenzene.Direct fluorination is too violent to be controlled in a standard lab setting.

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Fluorobenzene (C_{6} H_{5} F) can be synthesized in the laboratory:

by heating phenol with HF and KF

from aniline by diazotisation followed by heating the diazonium salt with HBF_{4}

by direct fluorination of benzene with F_{2} gas

by reacting bromobenzene with NaF solution

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