Sodium hydrogen carbonate (NaHCO3) which is also known as baking soda or eatable soda.
i. Soda acid fire extinguishers contain a mixture of sulphuric acid and baking soda inside it.
ii. When knob of the fire extinguisher is pressed, sulphuric acid get mixed with baking soda which produces a lot of CO2 gas.
iii. CO2 gas covers the surroundings of fire.
iv. It stops the supply of air to the burning substance.
v. Hence, fire gets extinguished.
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