What is the intermediate product obtained in the preparation of phenol from aniline?

Name the catalyst used in the commercial preparation of phenol.

Consider the following sequence of reactions:
$C_6H_6 + CH_3CH=CH_2$ $\xrightarrow[heat]{H_3PO_4} A$ $\xrightarrow[2. H_3O^{+}, heat]{1. O_2, heat} B + C$
The products $(B)$ and $(C)$ are:

Which of the following will give phenol with $O_2$ in the presence of an acid catalyst?

The major product formed in the following reaction sequence is:

Boiling water reacts with $C_6H_5N_2^+Cl^-$ to give: