While diluting a solution of salt in water,a student by mistake added acetone (boiling point $56\,^oC$). What technique can be employed to get back the acetone? Justify your choice.

(DISTILLATION) Acetone can be separated from the mixture using the technique of distillation.
Distillation is used for the separation of components of a mixture containing two miscible liquids that boil without decomposition and have sufficient difference in their boiling points.
Since the boiling point of acetone $(56\,^oC)$ is significantly lower than that of water $(100\,^oC)$,acetone will vaporize first upon heating.
The vapors can then be passed through a condenser to be collected as a liquid,effectively separating it from the salt-water solution.