how do we obtain oil from

mixture of oil and water? explain the process

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, about which you will study in grade 9. 

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we obtain oil from water by decantation or by using a separating funnel. It is a glass bulb connected to a funnel fitted to a stopper. the mixtute is poured in it .The stopper is left open and when the oil comes in the funnel the stopper is closed.

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We can oil from water by decantation.

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