What does one mean by exothermic and endothermic reactions? Give examples.

Question 9. What does one mean by exothermic and endothermic reactions? Give examples.
Answer:
Exothermic Reaction: A chemical reaction in which heat is given out is known as exothermic reaction. For example

Endothermic Reaction: A chemical reaction in which heat energy is absorbed is known as endothermic reaction. For example