Phenol $\xrightarrow{NaNO_2/H_2SO_4} B$ $\xrightarrow{H_2O} C$ $\xrightarrow{NaOH} D$. The name of the above reaction is:

An organic compound with the molecular formula $C_6H_6O$ dissolves in $NaOH$, gives a characteristic colour with neutral $FeCl_3$ and on treatment with bromine water gives a tri-bromo derivative. Which is that compound among the following?

Given below are two statements: one is labelled as Assertion $A$ and the other is labelled as Reason $R$:
Assertion $A$: Aryl halides cannot be prepared by the replacement of the hydroxyl group of phenol by a halogen atom.
Reason $R$: Phenols react with halogen acids violently.
In the light of the above statements,choose the most appropriate from the options given below:

In the given reaction sequence,identify the final product $B$:
Phenol $\xrightarrow[(2) CO_2]{(1) OH^-} A$ $\xrightarrow[Pyridine]{CH_3COCl} B$

Among the given pairs,in which pair is the second compound more acidic than the first?

Identify compound $(Z)$ in the following reaction sequence.