Name the reagents which are used in the following conversions :

Butan-$2$-one to butan-$2$-ol

Name the reagents which are used in the following conversions :

Phenol to $2,4,6$-tribromophenol.

Complete the following reaction equations:

Give a chemical test to distinguish between the following pairs of compounds:

Explain the following observations:

The boiling point of ethanol is higher than that of methoxymethane.

Explain the following observations: Phenol is more acidic than ethanol.

Explain the following observations:

$\mathrm{o}$-and $\mathrm{p}$ -nitrophenols are more acidic than phenol.