A teacher makes the following statement. "Gasoline boils at a relatively low temperature (about 150°C). The kerosene is removed at around 200°C, followed by diesel oil at 300°C and fuel oil at around 370°C." What topic is the teacher most likely talking about?
distillation of a mixture
filtration of a pure substance
evaporation of a mixture
sorting of a pure substance

distillation of a mixture

Explanation:

Distillation is a process that is used to separate mixture of different liquid substances based on the boiling points of each of the substances in the mixture.

For example, a mixture containing alcohol (ethanol) and water can be separated by boiling the mixture at a slightly high temperature till all the ethanol evaporates off. Ethanol has a boiling point of while pure water boils at . The ethanol evaporates off at (and can be collected in a chamber) while the water remains.

Hence, the teacher was most likely talking about distillation of a mixture.

force tends to be low and long diustance masses are high

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