Which of the following mixtures can be separated through decantation?
A.oil and water
B.salt and water
C.pepper and salt
D.sugar and flour
The answer is A. Oil and Water
Decantation is a process where two liquids are separated by means of letting them settle above or under the solution.
In this case, oil is less denser than water thus being oil having afloat into the water. Assuming a solution with oil and water is mixed, oil and water would never mix each other, instead oil will settle above the water.
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