6. Separating Mixtures

1. Which of the following is not an application of fractional distillation?

2. A mixture containing sugar and sand is contaminated with traces of Steel. In what order should the separation technique be carried out to obtain each substance separately? First ——————————————————> Last

3. The diagram shows a technique to separate a mixture. What is the working principle for this technique to separate a mixture?

4. Which of the following reason best explain why the filtrate is heated to become a saturated solution?

5. Which of the following about the advantages of chromatography is correct? I. it requires only a minute amount of sample II. it can be used to separate complex substance III. it takes less time to give an accurate analysis of a sample

6. The diagram shows the separating technique. What is the function of apparatus X?

7. The table shows the information of four different substances. Which of the substances will be the last substance left in the distillation flask during fractional distillation?

Substance	Melting point (in degree)	Boiling Point (In degree )
A	-56	65
B	-98	55
C	-76	85
D	-25	75

8. Which of the following mixtures can be separated by sublimation?

9. The diagram shows a chromatogram of four-link sample P to S. Which of the following statements is not correct?

10. The diagram shows the result of a chromatogram obtained from the analysis of food sample X using ethanol as a solvent. Which of the following statements about the chromatogram is not correct?

11. Equal amount of silver nitrate sodium and sodium chloride solution are added into a beaker. After mixing this solution, the Baker is left undisturbed for a while. When a solid substance is found tilting at the bottom of the beaker in the solution. Which one of the following techniques can be used to separate the product formed after mixing the two solutions.

12. Which of the following statement is correct in the purification method?

13. The diagram below shows a sample of seawater in the process of distillation. What is the function of suspense x in this process?

14. Which of the following physical means are possible to be used to separate oxygen from nitrogen in the air?

15. The diagram shows an experiment using this visking tubing. At the end of the experiment, starch is not present in the water. Which of the following physical method has the similar principle as the visking tubing?

16. The diagram shows the process of distillation. In which part of liquid particles gain energy?

17. The diagram below shows the setup of simple distillation. which position A, B, C, or D should the bulb of the thermometer be placed?

18. Which of the following mixture is suitable for the separation by crystallization?

19. Which of the following method is used to obtain pure water by desalination?

20. Which of the following method is used to obtain pure water by desalination?

21. Ethanol can be separated from the water in alcoholic beverages by fractional distillation. Which property enables the successful separation of these two substances by this method?

22. The diagram below shows the chromatogram obtained after the paper chromatography is carried out to identify the sample X. Which dyes P, Q, R or S are present in sample X?

23. Which property in a bus the separation of a mixture by using paper chromatography more effectively?

24. The diagram below shows the process of filtration. At which point, A, B, C or D is the residue of the filtration?

25. Which of the following example can be separated by simple distillation?  

26. The diagram below shows a mixture of two substances, X and Y. Which of the following is correct?

27. When iron is exposed to the air and water, it combines with oxygen to form iron oxide. Which method can be used to change iron oxide back into a simpler substance?

28. Which method can be used to separate steel powder from aluminium powder?  

29. Which of the following is the correct procedure for separating a mixture of insoluble silver chloride from soluble lithium nitrate?  

30. The diagram shows a chromatogram. Which of the component dissolves the best in the solvent used in the chromatography?