Name the catalyst used in the commercial preparation of phenol.

Phenol is obtained by heating an aqueous solution of:

In the following reaction,
$X \xrightarrow[(ii) \text{ aq. acid}]{(i) \text{ O}_2, \text{ catalyst, heat}} \text{Phenol} + Y (C_6H_{10}O)$
$X$ and $Y$ respectively,are $......$

Identify the substrate $X$ in the following reaction. $X + O_2 \text{ (air)}$ $\xrightarrow[\text{ii) dil } HCl, \Delta]{\text{i) Co-naphthenate, } 423 \ K} \text{Phenol} + \text{Acetone}$

Phenol is mainly manufactured from a compound $X$ by subjecting it to oxidation in air followed by treating with dilute acid. Identify the compound $X$.

Which catalyst is used in the conversion of chlorobenzene to phenol by the Raschig process?