What does phenol give with dilute $HNO_3$?

Which product is obtained when chlorobenzene is reacted with $6-8\%$ aqueous $NaOH$ at $633\,K$ temperature and $300\,bar$ pressure in the presence of an acid catalyst?

Describe the electrophilic aromatic substitution reactions of phenol.

The following reaction is known as:

The ratio of the number of oxygen atoms to bromine atoms in the product $Q$ is $.... \times 10^{-1}$.

Identify $X$ and $Y$ in the following reactions: