Question

what do you mean by residue?Give example.​

Answer 1

■ Residue is what is left after the main part of something is taken or used.

● example = In chemistry residue is whatever remains or acts as a contaminant after a given class of events. Residue may be the material remaining after a process of preparation, separation, or purification, such as distillation, evaporation, or filtration. It may also denote the undesired by-products of a chemical reaction.