Which of the following compound is used as fire extinguisher?
Which of the following compound is used as fire extinguisher?
$\mathrm{NaHCO}_{3}$
$\mathrm{Na}_{2} \mathrm{CO}_{3}$
$\mathrm{NaOH}$
$\mathrm{Na}_{2} \mathrm{SO}_{4}$
Solution
When the fire extinguisher is operated by pressing the knob on it, the sulphuric acid gets mixed with sodium bicarbonate solution producing a lot of carbon dioxide gas. Carbon dioxide gas is neither combustible nor helps combustion. Hence, sodium bicarbonate is used in fire extinguishers