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Which gas is released on heating sodium hydrogen carbonate and helps cakes rise?

Answer and explanation

Correct answer: Carbon dioxide

On heating, sodium hydrogen carbonate, NaHCO₃, undergoes thermal decomposition: 2NaHCO₃ → Na₂CO₃ + H₂O + CO₂. The carbon dioxide produced forms bubbles in the batter, and these bubbles expand during heating, making the cake rise and become porous. Therefore option A is correct. Hydrogen is not produced in this decomposition, while chlorine and nitrogen are not products of sodium hydrogen carbonate heating.

Related tags

Baking SodaCarbon DioxideThermal DecompositionChemical Reactions And EquationsChemical Substances – Nature And BehaviourChemical Substances Nature And BehaviourScienceClass 10 Mcq

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