Chemistry · May / June 2022 · Paper 11 · Question 2
5070Separation and purification
Four mixtures, each containing two substances, are shown in the table. The two substances need to be separated and collected. Which row is correct?
- Acopper(II) sulfate and water — chromatography
- Bmethanol and ethanol — evaporation
- Coxygen and nitrogen — fractional distillation
- Dsand and barium sulfate — filtration
As printed in the paper
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Correct answer: C. oxygen and nitrogen — fractional distillation
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