Explain why $-\mathrm{OH}$ group attached to benzene ring activates it towards electrophilic substitution?

With a suitable example write equation for the following:

Kolbe's reaction

With a suitable example write equation for the following:

Reimer-Tiemann reaction

With a suitable example write equation for the following:

Williamson's ether synthesis.

How is the following conversion carried out?

Benzyl chloride to benzyl alcohol?

How is the following conversion carried out?

Ethyl magnesium bromide to propane-$1$-ol

How is the following conversion carried out?

$2$-Butanone to $2$-Butanol

Write the names of the reactants and equation for the preparation of the following ether by Williamson's synthesis.

$1$-Propoxypropane

Write the names of the reactants and equation for the preparation of the following ether by Williamson's synthesis.

Ethoxybenzene