Which of the following is NOT a method used for separating mixtures?

The answer is correct because condensation refers to the physical process where a substance changes from a gas to a liquid, often as a result of cooling. It is not a method typically used for separating mixtures, but rather a phase change that can occur within mixtures under the right conditions, such as when forming a liquid from vapor.

On the other hand, distillation, filtration, and centrifugation are all established techniques used to separate components in mixtures based on their physical properties. Distillation separates components based on differences in boiling points, filtration relies on particle size to separate solids from liquids, and centrifugation uses the principle of density and centripetal force to separate particles suspended in a liquid. Each of these methods is actively employed in various scientific and industrial processes for isolating specific substances from mixtures.