Question

$C{O}_2$ extinguishers have ____________ as raw materials.

• A. Sodium Bicabonate
• B. Potassium Bicarbonate
• C. Potassium Bicarbonate and Sodium Bicabonate
• D. Nitrogen

Answer 1

The correct option is C

Potassium Bicarbonate and Sodium Bicabonate

Sodium bicarbonate and potassium bicarbonate decompose to form $C{O}_2$ when exposed to high temperature. $C{O}_2$ is heavier than air, hence when $C{O}_2$ extinguishers are used, $C{O}_2$ replaces the air from the surface of fire and cuts the supply of oxygen. In this way, $C{O}_2$ helps in extinguishing the fire.