$\mathrm{n}-$Propyl bromide $\left(\mathrm{A}\right)$ when boiled with aqueous $\mathrm{KOH}$ undergoes hydrolysis forming compound '$\mathrm{B}$'. The compound '$\mathrm{B}$' reacts with concentrated sulphuric acid at $443 \mathrm{K}$ to yield compound '$\mathrm{C}$'. Identify the compounds '$\mathrm{B}$' and '$\mathrm{C}$'.

Identify $\mathrm{A}$ and $\mathrm{B}$ in following reaction

Benzene azo-$\mathrm{\beta }$naphthol is an orange red dye widely used in textile industry for dyeing purpose. What are the structures of the reactants needed to prepare this dye?

Identify $\mathrm{X}, \mathrm{Y} \text{and} \mathrm{Z}$ in following reaction

The major products of the following reactions are:

Identify the products $\mathrm{B}$ and $\mathrm{C}$.