The chemical reaction in which heat is released is called __________ reaction.

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Solution

A chemical reaction may be associated with the release or absorption of energy. It is of two types
Exothermic reaction - A reaction in which energy is released in the form of heat during the reaction is called an exothermic reaction.
$Reactant \to Product + energy$
2. Endothermic reaction-A reaction in which energy is absorbed by reactants from surroundings during the reaction is called an exothermic reaction.
$Reactant + enegry \to Product$
Therefore the chemical reaction in which heat is released is called an exothermic reaction.

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