Azo dye is prepared by the coupling of phenol and:

Explain the acidic reactions of phenol and describe its acidic nature and strength.

Identify the products $[A]$ and $[B]$,respectively in the following reaction:

The reaction is given as: $X \xrightarrow{Y} \text{Benzoquinone}$. Identify $X$ and $Y$ in the above reaction.

Identify the type of reaction shown in the following chemical equation:
$C_6H_5OH + 3Br_2 \rightarrow C_6H_2Br_3OH + 3HBr$

Phenol $\xrightarrow[\Delta ]{Zn} A$ $\xrightarrow[\text{Anhydrous } AlCl_3]{CH_3Cl} B$ $\xrightarrow[\Delta ]{KMnO_4/OH^{-}} C$
The product $C$ is