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Which gas can be released when baking soda is heated?

Answer and explanation

Correct answer: Carbon dioxide

Baking soda is sodium hydrogen carbonate, NaHCO₃. On heating, it decomposes according to 2NaHCO₃ → Na₂CO₃ + H₂O + CO₂, so carbon dioxide gas is released and option A is correct. The carbon dioxide forms bubbles and can help cakes or bread rise when the gas is trapped in the mixture. Hydrogen, oxygen, and nitrogen are not products of this decomposition.

Related tags

Baking SodaSodium Hydrogen CarbonateCarbon DioxideThermal DecompositionAcids Bases SaltsAcidsBasesAnd SaltsAcids Bases And SaltsChemical Substances – Nature And Behaviour

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