What happens when sodium chloride is reacted with sulphuric acid?

Find $\mathrm{A}, \mathrm{B}$ and $\mathrm{C}$ in the following reactions:

${\mathrm{NH}}_3+\mathrm{A}+{\mathrm{CO}}_2\to {\left({\mathrm{NH}}_4\right)}_2{\mathrm{CO}}_3$

${\left({\mathrm{NH}}_4\right)}_2{\mathrm{CO}}_3+{\mathrm{H}}_2\mathrm{O}+\mathrm{B}\to {\mathrm{NH}}_4{\mathrm{HCO}}_3$

${\mathrm{NH}}_4{\mathrm{HCO}}_3+\mathrm{NaCl}\to {\mathrm{NH}}_4\mathrm{Cl}+\mathrm{C}$

Match List-$\mathrm{I}$ with List-$\mathrm{II}$

Choose the correct answer from the options given below:

Products $(\mathrm{X}$ and $\mathrm{Y})$ of the following reactions (I and II) are :
I. $\underset{(\mathrm{Cold} \mathrm{and} \mathrm{dil}.)}{2\mathrm{NaOH}}+{\mathrm{Cl}}_2⟶\mathrm{NaCl}+\mathrm{X}+{\mathrm{H}}_2\mathrm{O}$

II. $\underset{(\mathrm{Hot} \mathrm{and} \mathrm{conc}.)}{6\mathrm{NaOH}}+3{\mathrm{Cl}}_2⟶\mathrm{NaCl}+\mathrm{Y}+3{\mathrm{H}}_2\mathrm{O}$

Electrolysis of aqueous $\mathrm{NaCl}$ may produce with mercury cathode:

Sodium chloride itself is not deliquescent, but it absorbs moisture when exposed to air. Why?

Crude common salt becomes damp on keeping it in the air because

What is the heat of solution of sodium chloride from the following data?

The hydration energy of ${\mathrm{Na}}^{+}=-389.4 \mathrm{kJ} {\mathrm{mol}}^{-1}$

The hydration energy of ${\mathrm{Cl}}^{-}=-382.3 \mathrm{kJ} {\mathrm{mol}}^{-1}$

The lattice energy of $\mathrm{NaCl}=776 \mathrm{kJ} {\mathrm{mol}}^{-1}$

Represent the union of two sets by Venn diagram for each of the following.

$X=\{x | x$ is a prime number between $80$ and $100\}$

$Y=\{y | y$ is an odd number between $90$ and $100\}$

Sodium metal cannot be obtained by the electrolysis of an aqueous sodium chloride solution. Why?