Chemical Reactions of Diazonium Salts

What is Sandmayer's reaction. Explain.

By which reaction, you will obtain phenol from diazonium salts?

What is the required temperature for hydroxylation of diazonium salts?

What is the hydroxylation reaction of diazonium salts?

In Gattermann reaction, ${\mathrm{HBF}}_4$ reacts with benzene diazonium chloride to prepare the haloarene.

Benzene diazonium chloride reacts with Fluoro boric acid. It can also form dye.

Diazonium salt can react with Fluoroboric acid. Can it undergo hydrolysis? Give reaction.

How does the diazonium salt reacted with fluoroboric acid?

A yellow coloured dye is obtained by the reaction of $\mathrm{X}$ with benzene diazonium chloride. The reactant $\mathrm{X}$ is

Benzene diazonium chloride on hydrolysis gives

Phenol can be prepared from aniline, by first converting aniline into a _____ salt. Then, treating the product of the previous step by warm water, we get phenol.

Balz-schiemann reaction is used to prepare aryl fluorides from diazonium salts and fluoroboic acid.

$\mathrm{Ar}-{\mathrm{N}}_2\mathrm{X}\stackrel{}{\stackrel{{\mathrm{HBF}}_4}{\to } \mathrm{Ar}-{\mathrm{N}}_2} {{\mathrm{BF}}^{-}}_4\stackrel{∆}{\to }\mathrm{Ar}-\mathrm{F}+{\mathrm{BF}}_3+{\mathrm{N}}_2\uparrow$

Which of the following reactions shows this kind of reaction ?

_____ is used to prepare aryl fluorides from diazonium salts and fluoroboic acid ?

Which of the following reactions is used to prepare aryl fluorides from diazonium salts and fluoroboic acid ?

The reaction of diazonium salt with aniline yields p-aminoazobenzene.Comment.

What is the coupling reaction ?