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Which one of the following is used in Soda-Acid Fire Extinguishers?

  • 1.Sodium chloride
  • 2.Sodium hydrogen carbonate
  • 3.Calcium hydroxide
  • 4.Acetic acid
Correct Answer
Option 2:Sodium hydrogen carbonate

Sodium hydrogen carbonate is used in soda-acid fire extinguishers. Fire extinguishers made of soda acid are composed of sodium bicarbonate and sulfuric acid. A side discharge nozzle is located on a sturdy iron vessel. There is a sodium bicarbonate solution inside the iron container.

Operating Principle of the Fire Extinguisher

  • lowering the combustible material's temperature below the ignition point.
  • cutting off the flow of air.
  • shutting off the air supply while simultaneously cooling the flammable substance


  • When the fire extinguisher is used, sulphuric acid and sodium bicarbonate solution combine to produce a small amount of carbon dioxide gas.
  • The fire extinguisher contains sulfuric acid in a separate bottle and a solution of sodium bicarbonate in water.
  • The gas carbon dioxide neither supports nor is it combustible.
  • Because it is heavier than air, it snuffs out the oxygen in the air, putting out the flames.


Which one of the following is used in soda-acid fire extinguishers?

In soda-acid fire extinguishers, sodium hydrogen carbonate is employed. The following reaction takes place 2NaHCO3 + H2SO4 →Na2SO4 + 2H2O+2CO2.

Which one of the following is used in Soda-Acid Fire Extinguishers?


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