Phenol $\xrightarrow{Br_2 / H_2O}$ Product formed is

When phenol reacts with dilute nitric acid at room temperature,the major product obtained is

Rank the following compounds in the order of increasing acidity:
$(I)$ Cyclohexanol
$(II)$ Cyclohexylamine
$(III)$ Phenol

What is the name of the reaction between an aromatic acyl chloride and phenol in the presence of a base like $NaOH$ or pyridine?

In the given reaction sequence,identify the processes $X$ and $Y$ respectively to obtain salicylaldehyde from chlorobenzene:
$Chlorobenzene$ $\xrightarrow{X} Phenol$ $\xrightarrow{Y} Salicylaldehyde$

Cumene on oxidation in air gives a compound,$X$. This on reaction with dilute acid gives $Y$ and $Z$. $Y$ reacts with sodium metal and not $Z$. What is $Z$ ?