Sagot :
Question
How is a mixture of sand and water separated?
A. by sieving
B. by chromatography
C. by winnowing
D. by decantation
Answer
B. by chromatography
Answer
Chromatography is a laboratory technique for the separation of a mixture. The mixture is dissolved in a fluid called the mobile phase, which carries it through a system on which a material called the stationary phase is fixed.
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