Explain the terms with examples :
* Endothermic reaction

Explanation

Endothermic reaction : The reaction in which heat is absorbed is called an endothermic reaction.
When `KNO_(3_((s)))` dissolves in water, there is absorption of heat during the reaction and the temperature of the solution falls .
`KNO_(3_((s)))+H_(2)O_((1))+"Heat"rarrKNO_(3_((s)))`