Chemical Reactions of Diazonium Salts

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

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

Which of the following reactions shows this kind of reaction ?

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

What is the coupling reaction ?

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

The reagents that can be used to convert benzenediazonium chloride to benzene are _____.

Write short on Sandmeyer's reaction.

Select option(s) with correct major product:

Observe the following product

 It can be formed from which reactants pair given below by diazotisation & coupling ?