Can the oil and water be separated by distillation ??

Dear Student
Oil and water can be separated by distillation as long as the boiling points of both the components are entirely distinct. 

However, the most common method is to use a separation funnel.
 Oil and water can be separated using a separation funnel. The experimental set up is shown in the figure:



The mixture of oil and water is poured into the separating funnel and allowed to stand for some time. The oil accumulates at the top of the funnel and water near the bottom as shown in the figure. If the stop cock at the bottom is opened, water flows out of the funnel and can be collected in a beaker. If the stop cock is closed when the oil reaches the level of the stop cock, we will have oil in the funnel and water in the beaker.
Regards

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No...
Oil and water are immiscible liquids that is they do not mix with each other. Hence, they can be separated by sedimentation and decantation. When a mixture of oil and water is allowed to stand for some time, two separate layers are formed. Oil being lighter forms the top layer, while water being heavier forms the bottom layer. Oil can be separated by decantation.?

However, a more useful method for separating oil and water is with the help of separating funnel.
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