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Why can sodium hydrogen carbonate be used in fire extinguishers?

Answer and explanation

Correct answer: It can release carbon dioxide on heating

Sodium hydrogen carbonate, NaHCO₃, decomposes on heating according to the reaction 2NaHCO₃ → Na₂CO₃ + H₂O + CO₂. The released carbon dioxide does not support combustion and forms a layer that reduces the contact between the fire and atmospheric oxygen. Therefore it can help extinguish flames. It does not burn hydrogen, increase fire, or form only water, so option A is correct.

Related tags

Sodium-Hydrogen-CarbonateFire-ExtinguisherCarbon-DioxideDecompositionAcidsBasesAnd SaltsAcids Bases And SaltsChemical Substances – Nature And BehaviourChemical Substances Nature And Behaviour

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