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Class 10ScienceChemical Substances – Nature and BehaviourAcids, Bases, and SaltsEasy
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Which solid substance is formed when sodium hydrogen carbonate is heated?

Answer and explanation

Correct answer: Sodium carbonate

The governing concept is thermal decomposition of sodium hydrogen carbonate, commonly called baking soda. On heating, the balanced change is 2NaHCO3 → Na2CO3 + CO2 + H2O. Carbon dioxide and water are released, while sodium carbonate remains as the solid product. Thus option C is correct; the calcium compounds and sodium chloride are not products of this decomposition.

Related tags

Baking SodaThermal DecompositionSodium CarbonateAcidsBasesAnd SaltsAcids Bases And SaltsChemical Substances – Nature And BehaviourChemical Substances Nature And BehaviourScience
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