A beaker contains both alcohol and water. These liquids can be separated by distillation because the liquids have different
(1) boiling points (3) particle sizes
(2) densities (4) solubilities
The process of distillation is heating something up and then cooling it down. So, if a beaker had both alcohol and water and was then distilled, the two liquids would boil at different points, thus separating the liquids from each other.