Question

A chemical reaction in which heat is given out is called
(a) exothermic reaction
(b) endothermic reaction
(c) decomposition reaction
(d) neutralization reaction

Answer 1

Answer:

A) exothermic reaction

Answer 2

A chemical reaction in which heat is given out is called an (a) exothermic reaction.

In exothermic reactions, the energy that is required to start and maintain the reaction is less than the energy that is released. As a result, the excess of energy that is released is transmitted to the surrounding medium (which is usually the air surrounding the reaction site) in the form of heat. Most chemical reactions are exothermic in nature and give out heat.