The product obtained is/are

$A$ solution of phenol in chloroform when treated with aqueous $NaOH$ gives compound $P$ as a major product. The mass percentage of carbon in $P$ is $..............$ (to the nearest integer)
(Atomic mass : $C = 12$; $H = 1$; $O = 16$)

What product is formed when phenol reacts with dilute $HNO_3$?

The reaction of concentrated $HNO_3$ with phenol forms:

Identify the compound obtained in the following reaction:

Which among the following has the highest melting point?