In the following reactions, A, B, and C are-

$\begin{array}{l}{\mathrm{NH}}_3+\mathrm{A}+{\mathrm{CO}}_2\to {\left({\mathrm{NH}}_4\right)}_2{\mathrm{CO}}_3\\ {\left({\mathrm{NH}}_4\right)}_2{\mathrm{CO}}_3+{\mathrm{H}}_2\mathrm{O}+\mathrm{B}\to {\mathrm{NH}}_4{\mathrm{HCO}}_3\\ {\mathrm{NH}}_4{\mathrm{HCO}}_3+\mathrm{NaCl}\to {\mathrm{NH}}_4\mathrm{Cl}+\mathrm{C}\end{array}$

1. $\mathrm{A}={\mathrm{O}}_2;<mspace\; width="1em"></mspace>\mathrm{B}={\mathrm{CO}}_2;<mspace\; width="1em"></mspace>\mathrm{C}={\mathrm{Na}}_2{\mathrm{CO}}_3$

2. $\mathrm{A}={\mathrm{H}}_2\mathrm{O};<mspace\; width="1em"></mspace>\mathrm{B}={\mathrm{O}}_2;<mspace\; width="1em"></mspace>\mathrm{C}={\mathrm{Na}}_2{\mathrm{CO}}_3$

3. $\mathrm{A}={\mathrm{H}}_2\mathrm{O};<mspace\; width="1em"></mspace>\mathrm{B}={\mathrm{O}}_2;<mspace\; width="1em"></mspace>\mathrm{C}={\mathrm{NaHCO}}_3$

4. $\mathrm{A}={\mathrm{H}}_2\mathrm{O};<mspace\; width="1em"></mspace>\mathrm{B}={\mathrm{CO}}_2;<mspace\; width="1em"></mspace>\mathrm{C}={\mathrm{NaHCO}}_3$

Match the following compounds (Column I) with their uses (Column II):

Options:

A hydrated solid X on heating initially gives a monohydrated compound Y. Y upon heating above 373 K leads to an anhydrous white powder Z. X and Z, respectively, are:

1. Baking soda and dead burnt plaster.

2. Washing soda and soda ash.

3. Washing soda and dead burnt plaster.

4. Baking soda and soda ash