Fluorobenzene (C_6H_5F) can be synthesised in the laboratory

  • Option 1)

    by heating phenol with HF and KF

  • Option 2)

    from aniline by diazotization followed by heating the diazonium salt with HBF_4

  • Option 3)

    by direct fluorination of benzene with F_2 gas

  • Option 4)

    by reacting bromobenzene with NaF solution.

 

Answers (1)

As we learnt in 

By Sandmeyer's reaction -

In the reaction benzene diazonium chloride is treated with cuprous chloride cuprous bromide.

 

 


Option 1)

by heating phenol with HF and KF

This option is incorrect.

Option 2)

from aniline by diazotization followed by heating the diazonium salt with HBF_4

This option is correct.

Option 3)

by direct fluorination of benzene with F_2 gas

This option is incorrect.

Option 4)

by reacting bromobenzene with NaF solution.

This option is incorrect.

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