UPSC CDS 1 2021 GK Paper

The formula of soda acid is NaHCO3 . The soda acid fire extinguisher contains sodium bicarbonate and sulfuric acid. It is the most effective household fire extinguisher. Sulfuric acid is kept inside the iron vessel. Any fire extinguisher is a cooling of the combustible material, cut off the air supply. Soda acid fire extinguisher acts on all fire except due to electrical and inflammable liquid.