Write the balanced equation for the following chemical reaction.

Calcium carbonate $\left({\mathrm{CaCO}}_3\right)$ when heated splits into calcium oxide $\left(\mathrm{CaO}\right)$ and carbon dioxide $\left({\mathrm{CO}}_2\right)$

Write the balanced equation for the following chemical reaction.

Hydrogen $\left({\mathrm{H}}_2\right)$ combines with chlorine $\left({\mathrm{Cl}}_2\right)$ to give hydrogen chloride $\left(\mathrm{HCl}\right)$.

Write the balanced equation for the following chemical reaction.

Write the balanced equation for the following chemical reaction.

Potassium $\left(\mathrm{K}\right)$ combines with water $\left({\mathrm{H}}_2\mathrm{O}\right)$ to form potassium oxide $\left({\mathrm{K}}_2\mathrm{O}\right)$ and hydrogen $\left({\mathrm{H}}_2\right)$.

Write the balanced equation for the following chemical reaction.

Sodium hydroxide $\left(\mathrm{NaOH}\right)$ reacts with hydrogen sulphate $\left({\mathrm{H}}_2{\mathrm{SO}}_4\right)$ to give sodium sulphate $\left({\mathrm{Na}}_2{\mathrm{SO}}_4\right)$ and water $\left({\mathrm{H}}_2\mathrm{O}\right)$.

What are the reactants in the following reaction?

Calcium chloride $+$ Silver nitrate $\to$ Calcium nitrate $+$ Silver chloride

Which is/are the product(s) in the following reaction?

$2\mathrm{NaOH}+{\mathrm{CO}}_2\to {\mathrm{Na}}_2{\mathrm{CO}}_3+{\mathrm{H}}_2\mathrm{O}$