Question

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

Column 1	Column 2
$\mathrm{Ca}{\left(\mathrm{OH}\right)}_2$	Casts of statues
$\mathrm{NaCl}$	White wash
${\mathrm{CaSO}}_4·\frac{1}{2}{\mathrm{H}}_2\mathrm{O}$	Antacid
${\mathrm{CaCO}}_{3_{}}$	Washing soda preparation

Answer 1

1. Whitewash: First, calcium oxide (oxide) is generated to combine with water to create calcium hydroxide before we whiten the walls. The calcium hydroxide is then applied to the walls, where it gradually reacts with the air's carbon dioxide gas to create a thin, shiny film.
2. Washing soda preparation: Through Solvay's method, washing soda is produced. In the Solvay process, water reacts with sodium chloride, ammonia, and carbon dioxide.
3. Casts of statues: The mechanical transfer of a sculpture from one substance to another is technically known as a cast. This change is implemented by leaving a clear imprint on the original sculpture. A mold is a name for this imprint. ${\mathrm{CaSO}}_4·\frac{1}{2}{\mathrm{H}}_2\mathrm{O}$ is used in it. It is also called plaster of Paris.
4. Antacid: Antacids are medications that counteract (neutralize) your stomach's acid to ease heartburn and indigestion. They are available without a prescription from pharmacies and stores and come in liquid or chewable tablet form.${\mathrm{CaCO}}_{3_{}}$ is an antacid.

Final Answer: Hence, the correct match is -

A. $\mathrm{Ca}{\left(\mathrm{OH}\right)}_2$ - Whitewash

B. $\mathrm{NaCl}$ - Washing soda preparation

C. ${\mathrm{CaSO}}_4·\frac{1}{2}{\mathrm{H}}_2\mathrm{O}$ - Casts of statues

D. ${\mathrm{CaCO}}_{3_{}}$- Antacid