Question

Which of the following salt is used as an antacid?

• A. Potassium nitrate
• B. Copper sulphate
• C. Sodium bicarbonate
• D. Potash alum

Answer 1

The correct option is C

Sodium bicarbonate

The explanation for the correct option-

(C) Sodium bicarbonate $\mathrm{\left(}{\mathrm{NaHCO}}_{\mathrm{3}}\mathrm{\right)}$-

Uses of sodium bicarbonate :

• It is used as an antacid to neutralize stomach acid and give relief from acidity.
• It is used as baking powder in a bakery.

The explanation for the incorrect options-

(A) Potassium nitrate $\left({\mathrm{KNO}}_3\right)$- It is used as a fertilizer.

(B) Copper sulfate $\left({\mathrm{CuSO}}_4\right)$ - It is used as a fungicide.

(D) Potash alum $(\mathrm{KAl}{\left({\mathrm{SO}}_4\right)}_2·12{\mathrm{H}}_2\mathrm{O})$ - It is used in the filtration of water.

Hence, option (C) is correct.