Question

what is unique about fractional distillation? it uses heat within the column to separate the different oil products. it uses gravity to force certain substances to vaporize more easily. it leaves the original substance mixed instead of separating it. it uses magnetism instead of heat to separate substances.

Explanation:

Fractional distillation is a separation technique used in chemistry. It relies on the principle that different substances in a mixture have different boiling points. Heat is applied within a distillation column. As the mixture is heated, substances with lower boiling points vaporize first. These vapors rise up the column, and through a series of condensation and evaporation steps (using the heat within the column), the different components (like different oil products in petroleum refining) are separated. Gravity is not used to force substances to vaporize more easily in this process. Fractional distillation aims to separate the original mixture into its components, not leave it mixed. And it uses heat, not magnetism, for the separation.

Answer:

It uses heat within the column to separate the different oil products.