Impurities are the state of presence of adulterants in the substances. Impurities change the physical and chemical properties of the substances or materials. There are two types of impurities they are, organic impurities and inorganic impurities.

Solids which dissolve in a liquid are called solutes and the liquid in which the solute dissolves is called the solvent. A solid dissolves in a liquid to form a solution. A solution is a homogeneous mixture.

The liquid in which the solute dissolves is called the solvent. A solid dissolves in a liquid to form a solution. A solution is a homogeneous mixture.

Solids which dissolve in a liquid are called solutes and the liquid in which the solute dissolves is called the solvent. A solid dissolves in a liquid to form a solution. A solution is a homogeneous mixture. Example: Sugar solution, where sugar is the solid which is dissolved completely in the water to form the solution.