Which of the following reacts with diazonium salts to form dyes?

Phenol $\xrightarrow{Br_2 / H_2O}$ Product formed is

When phenol is treated with chloroform in the presence of sodium hydroxide,followed by hydrolysis in the presence of an acid,the product formed is:

Which one of the following phenols does not give colour when condensed with phthalic anhydride in the presence of conc. $H_2SO_4$?

The major product of the following reaction is
$2-(2-hydroxyethyl)phenol$ $\xrightarrow[2. \, CH_3I \, (1. \, eq.)]{1. \, K_2CO_3}$

Give two reactions that show the acidic nature of phenol. Compare the acidity of phenol with that of ethanol.