Class 10 Chemistry Chemical Reactions and Equations Decomposition reaction

Decomposition reaction

When reactants on application of energy either in the form of heat, light or electricity breaks down into products, the reaction is termed as decomposition reaction i.e. AB + Heat à A + B. Such reactions involving the absorption of heat are known as endothermic reactions.

Consider the following decomposition reactions.

  • Silver chloride turns grey in sunlight. This is due to the decomposition of silver chloride into silver and chlorine by light.

  • Decomposition of calcium carbonate to calcium oxide and carbon dioxide on application of heat. Calcium oxide also known lime or quick lime finds great use in the manufacture of cement. This reaction involves heating and hence is termed as thermal reaction.

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