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Class 6 Science Practice Test: Separation of Substances
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Class 6 Science Practice Test: Separation of Substances
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25 Questions

1. The property which forms the basis of sieving is
2. Tincture of iodine is a weak solution of iodine in alcohol. Iodine can be recovered from tincture of iodine by the process of
3. When no more salt dissolves in water at a particular temperature, then the solution at that temperature is called
4. When no more salt dissolves in water at a particular temperature, then the solution at that temperature is called
5. Which of the following method is used when there is a difference in size and colour of desirable and undesirable constituents?
6. Petroleum contains
7. Water present in …………… is in the form of water vapour.
8. Filtration is a method to separate the components of a
9. Common salt is recovered from sea water by the process of
10. A separation funnel is a ……….. bulb to the stem of which is fitted a stopcock.
11. Thresher machines are also used to thresh large quantities of ……………..
12. The process of separating grains from the stalks is called
13. The method of separation used to separate stones from rice is
14. An example of a heterogeneous mixture is
15. Distillation is a method of obtaining pure …………….. from a solution.
16. At water treatment plants, the river water is filtered by using
17. The separation of insoluble solids from liquids can be done by
18. A solid is dissolved in water. Which one of the following methods can be used to separate it?
19. Iodine can be recovered from tincture of iodine by the process of
20. Butter is separated from milk by
21. The components of a solution of sugar in water can be separated by
22. A mesh which is used to separate things on the basis of their difference in size
23. ………….. is a convenient method of separation.
24. The process of conversion of water into vapour is called
25. Mixtures need to be separated because

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