Which reaction is used to prepare $2$-hydroxybenzaldehyde from phenol?

The correct options for the products $A$ and $B$ of the following reactions are:

Product $(Q)$ in this reaction is

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?

Identify $X$ and $Y$ in the following reaction:
$X \xrightarrow{Y} \text{Benzoquinone}$

The gases evolved in reactions $(I)$ and $(II)$ are.......