Boiling point. Distillation is the process of removing one substance from another by boiling it away. This is possible because of differences in boiling points of two substances.
The distillation of crude oil is possible because of the differing boiling points of its components. They get vaporized at different temperatures and then condensed separately. Lower boiling point substances separate first. ;
The correct option is 4. boiling point, as this physical property allows for the separation of crude oil components through distillation. Distillation exploits the different boiling points, allowing lighter substances to be extracted first.
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