Separation Techniques

Grade 9 Science — Separation Techniques: 25 practice questions with instant scoring and explanations.

1. Evaporation is used to separate a:
2. Centrifugation is most useful for separating:
3. In paper chromatography, the stationary phase is:
4. Distillation is used to separate:
5. Fractional distillation is primarily used to separate:
6. Crystallisation is the best method to obtain pure solid crystals from:
7. Which separation technique is based on the differences in boiling points?
8. Filtration is used to separate:
9. In chromatography, the Rf value is defined as:
10. The principle behind centrifugation is:
11. A mixture of copper sulfate solution and oil can be separated using:
12. When separating a mixture of sand and salt, which method is MOST appropriate?
13. The mobile phase in paper chromatography is:
14. Fractional distillation requires:
15. Which separation technique would separate the dyes in ink?
16. During crystallisation, a pure crystal forms because:
17. Which separation technique is shown when a wet cloth dries on a clothesline?
18. The condenser in a distillation apparatus is used to:
19. A mixture of alcohol and water can be separated by:
20. Which technique would separate salt from seawater?
21. In paper chromatography, compounds with lower Rf values:
22. A mixture of oil droplets suspended in water can be best separated using:
23. Sublimation as a separation technique involves:
24. The purpose of a thermometer in distillation is to:
25. Which statement about filtration is correct?