Question

$C{O}_2$ extinguishers have ____________as raw materials.

• A. Sodium carbonate
• B. Potassium carbonate
• C. Potassium bicarbonate and Sodium bicarbonate
• D. Nitrogen

Answer 1

The correct option is C Potassium bicarbonate and Sodium bicarbonate

Sodium bicarbonate and potassium bicarbonate decomposes to form $C{O}_2$ when it is 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 thus cuts the supply of oxygen.
In this way, $C{O}_2$ helps in extinguishing the fire.