Fractional distillation is used in separation of crude oil instead of simple distillation. Why?

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Solution

A fractionating column is used in fractional distillation, because the liquid mixtures involved in the process, have boiling points that are similar to each other.
ie Fractional distillation is used for mor accuracy.
If the components in the mixture is having similar boiling points,we cannot seperate them by simple distillation.

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