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Properties of Colloids Chapter Exam

Exam Instructions:

Choose your answers to the questions and click 'Next' to see the next set of questions. You can skip questions if you would like and come back to them later with the "Go To First Skipped Question" button. When you have completed the practice exam, a green submit button will appear. Click it to see your results. Good luck!

Page 1

Question 1 1. Which of the following is NOT true about chromatography?

Question 2 2. Which of the following techniques would be most appropriate for separating large, temperature-sensitive molecules like proteins?

Question 3 3. Who invented chromatography?

Question 4 4. How does ultracentrifugation purify colloids?

Question 5 5. How does dialysis purify colloids?

Page 2

Question 6 6. How are lyophilic colloids prepared?

Question 7 7. Which of the following would be a crystalloid at low concentrations, but a colloid at high concentrations?

Question 8 8. Which of the following describes a colloid where solid particles are dispersed in a liquid?

Question 9 9. What particle size differentiates between colloidal solution and suspensions?

Question 10 10. This is a heterogeneous mixture that contains large particles.

Page 3

Question 11 11. This is a homogeneous mixture that contains very small particles.

Question 12 12. We know that sugar water is this type of mixture because light easily passes through it and the sugar particles do not settle out.

Question 13 13. How would you differentiate a colloid mixture from a solution?

Question 14 14. According to the Tyndall Effect, how would you be able to identify a colloid mixture?

Question 15 15. A _____ is a mixture where at least two substances with intermediate sized particles are combined together and stay together.

Page 4

Question 16 16. Which of the following is NOT an example of an emulsified mixture?

Question 17 17. Which of these is a good example of an emulsifier?

Question 18 18. How does an emulsifier work?

Question 19 19. Which of the following best describes physisorption?

Question 20 20. Which of the following best describes the Langmuir isotherm?

Page 5

Question 21 21. What is adsorption?

Question 22 22. The molecules in crystalloid solutions have which property?

Question 23 23. A crystalloid solution contains _____.

Question 24 24. Crytalloids are known by their composition and/or _____.

Question 25 25. What does it mean to say an analyte has a distribution ratio in a chromatographic system?

Page 6

Question 26 26. What is a lyophilic colloid?

Question 27 27. Which of the following is a homogeneous mixture?

Question 28 28. With this type of mixture the particles settle out to form a separate layer.

Question 29 29. What technique can be used to distinguish between a suspension and a colloid?

Question 30 30. What acts as an emulsifier in cookie dough?

Properties of Colloids Chapter Exam Instructions

Choose your answers to the questions and click 'Next' to see the next set of questions. You can skip questions if you would like and come back to them later with the "Go To First Skipped Question" button. When you have completed the practice exam, a green submit button will appear. Click it to see your results. Good luck!

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