Question

In which of the following cases can we use sedimentation and decantation as a method for separation of the components?

• A. For separating oil and water
• B. For separating mixture of chalk powder and wheat flour
• C. For separating salt and water from salt solution
• D. For separating stones and rice

Answer 1

The correct option is A

For separating oil and water

Oil and water are immiscible. If a mixture of such liquids is allowed to stand for some time then they will form two separate layers. The heavier liquid settles down and lighter liquid floats on the surface. The component that forms the top layer can then be separated by decantation. While the heavier component settles down and cab be obtained by the process of sedimentation.