Reactions of diazonium salts

Phenol on reaction with benzenediazonium chloride forms orange dye.

Which of the following the product is formed by the reaction of phenol with benzenediazonium chloride?

Define coupling reaction. Give an example.

When benzene diazonium chloride is heated with ethyl alcohol it gives benzyl alcohol and ethanal.

What is $\mathrm{X}$ in the following reaction?

${\mathrm{C}}_6{\mathrm{H}}_5-{{\mathrm{N}}_2}^{+}{\mathrm{Cl}}^{-} +{\mathrm{H}}_3{\mathrm{PO}}_2+ {\mathrm{H}}_2\mathrm{O} \stackrel{\mathrm{Cu}\left(\mathrm{I}\right)}{\to } \mathrm{X} + {\mathrm{N}}_2+ {\mathrm{H}}_3{\mathrm{PO}}_3+\mathrm{HCl}$

Describe the coupling reaction between benzenediazonium chloride and phenol.

What happens when benzene diazonium chloride is heated with ethanol? Write the balanced chemical equation.

Predict the products.

${\mathrm{C}}_6{\mathrm{H}}_5-{{\mathrm{N}}_2}^{+}{\mathrm{Cl}}^{-} +{\mathrm{H}}_3{\mathrm{PO}}_2+ {\mathrm{H}}_2\mathrm{O} \stackrel{\mathrm{Cu}\left(\mathrm{I}\right)}{\to }\mathrm{\_\_\_\_\_} + \mathrm{\_\_\_\_\_} + \mathrm{\_\_\_\_\_}+\mathrm{\_\_\_\_\_}$

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

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 ?

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

Which of the following cannot be prepared by Sandmeyer’s reaction?

Write short on Sandmeyer's reaction.