Impurity :-
The term impurity refers to a substance or element that is present in a material or mixture that is not normally found in it or that is present in a greater amount than is typically present.
Impurities can be introduced into a material during its production or can be contaminants that enter the material during processing or handling.
Impurities can have various effects on the properties and characteristics of a material, and their presence may be undesirable or even harmful depending on the context. In the context of chemistry, impurities can refer to any substance that is not the desired product of a chemical reaction, such as byproducts or unreacted starting materials.
