If, Aniline $$\frac{\text { i) } \mathrm{NaNO}_2+\mathrm{HCl}, 273 \mathrm{~K}}{\text { ii) } \mathrm{H}_2 \mathrm{O}, \Delta}$$ Product.

Identify the product of above reaction.

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

$$\mathrm{CH}_3 \mathrm{Br} \stackrel{\mathrm{AgNO}_2}{\longrightarrow} \mathrm{A} \stackrel{\mathrm{Sn} / \mathrm{HCl}}{\longrightarrow} \mathrm{B}$$

Which among the following reagents is called as Hinsberg's reagent?

Which among the following amines has highest value of $$\mathrm{pK}_{\mathrm{b}}$$ ?