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When a single compound breaks down into two or more simpler products on heating, what type of reaction is it?

Answer and explanation

Correct answer: Thermal decomposition reaction

The governing concept is decomposition: one compound splits into two or more simpler substances. Because heat supplies the energy required for this breakdown, the reaction is specifically called thermal decomposition. For example, calcium carbonate decomposes on heating: CaCO₃ → CaO + CO₂. A combination reaction forms one product from several reactants, while double-displacement and precipitation involve exchange of ions, so option A is correct.

Related tags

ScienceClass 10Chemical ReactionsThermal DecompositionChemical Reactions And EquationsChemical Substances – Nature And BehaviourChemical Substances Nature And BehaviourClass 10 Mcq

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