Question

what is decomposition reaction​

Answer 1

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A decomposition reaction is a type of chemical reaction in which a single compound breaks down into two or more elements or new compounds. These reactions often involve an energy source such as heat, light, or electricity that breaks apart the bonds of compounds.

Answer 2

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☛ Those reactions in which a compound splits up into two or more simpler substances are known as decomposition reaction.

☛ The Decomposition reactions are carried out by applying heat light or electricity.Heat,light or electricity provide energy which breaks a compound into two or more simpler compounds.

☛ A decomposition reaction is just the opposite of a combination reaction.

☛ Example :- when calcium carbonate is heated,it decomposes to give calcium oxide and carbon dioxide.

$\rm\:CaCO_3\:(s)\:\xrightarrow[\text{(Decomposition)}]{\text{Heat}}\:CaO\:(s)\:+\:CO_2\:(g)$