Explanation:

Soda-acid fire extinguisher contains a solution of sodium hydrogen carbonate and sulfuric acid. The following reaction takes place:

This increases the percentage of carbon dioxide in the air. Due to this, the supply of air is cut off, and the fire is extinguished. Soda-acid fire extinguishers comprise sodium bicarbonate and sulphuric acid. • It is the most effective house-hold fire extinguisher. • It comprises of a strong iron vessel with a side discharge nozzle. The iron vessel is filled with the sodium bicarbonate solution. • A small glass bottle, which is filled with the sulphuric acid, is supported inside the iron vessel. A knob gets fixed just above this bottle. • On striking of the knob, the acid bottle breaks open into the sodium bicarbonate solution. The sulphuric acid reacts with