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When calcium carbonate is heated a solid and a gas are formed. What type of reaction is this?

Answer and explanation

Correct answer: Thermal decomposition

On heating, calcium carbonate decomposes according to CaCO₃ → CaO + CO₂. A single compound breaks into two simpler products: solid calcium oxide and gaseous carbon dioxide. Since heat is supplied to cause the breakdown, the reaction is specifically called thermal decomposition. It is not combination, because one product is not formed, and no exchange or displacement of ions occurs.

Related tags

ScienceClass10Chemical-ReactionsThermal-DecompositionCalcium-CarbonateChemical Reactions And EquationsChemical Substances – Nature And BehaviourChemical Substances Nature And Behaviour

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