If only the dissolved solid is needed and solvent is not required which method is simple?

Correct answer: Evaporation

In evaporation, the solution is heated so that the solvent changes into vapour, leaving the dissolved solid behind as residue. Therefore, it is the simplest method when only the solid is required and the solvent need not be recovered. Simple distillation is unnecessary here because it is used when the solvent is also to be collected. Exam tip: first identify whether the solute, the solvent, or both are required.