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explain Soda- acid fire extinguisher in detail with labelled diagram
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Soda acid type extinguisher acts by cutting off supply of air. It acts on all types of fire except due to electrical and inflammable liquids. The carbon dioxide is liberated by the action of acid on baking soda. It increases the percentage of carbon dioxide in air (CO2 is non supporter of combustion)
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A soda-acid type fire extinguisher contains concentrated solution of sodium hydrogen carbonate (NaHCO3) in a small cylinder fitted with a glass bottle filled with sulphuric acid. Once the bottle breaks, the acid reacts with sodium hydrogen carbonate to evolve carbon dioxide and water in the form of vapours
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