The reaction 2KClO3(s) --> 2KCl(s) + 3O2(g) is a(n) Group of answer choices
combustion reaction.
ionic reaction.
synthesis reaction.
decomposition reaction.

decomposition reaction.

Explanation:

It is a decomposition reaction as potassium chlorate compound breaks to form potassium chloride and oxygen. This reaction requires heat as source of energy to break down the compound so it is endothermic in nature.

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