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CHEM108 Final Exam - Analytical Chemistry
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MCQs on the analytical theories and methods of qualitative and quantitative chemical analysis. Topics include gravimetric analysis, titrations, ultraviolet-visible (UV-Vis), infrared (IR), and nuclear magnetic resonance (NMR) spectroscopies, atomic absorption and emission, fluorescence and phosphorescence, chromatographic methods, including, column chromatography, gas chromatography (GC), and high pressure liquid chromatography (HPLC), electrophoresis, and electrochemical analysis techniques.

 

CHEM108 Final Exam - Analytical Chemistry
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25 Questions

1. Where does the oxidation reaction occur?
2. The 'void peak' in a chromatogram corresponds to which of the following?
3. The concentration of a solution is known to be 0.101 M. A student determines the concentration to be 0.088 M, 0.087 M, and 0.089 M for each titration performed. Which of the following best describes these results?
4. In order for a compound to be IR active, it must undergo which of the following?
5. Fluorescence occurs as a result of which of the following?
6. What is the process of the loss of an electron called?
7. How many milliliters of a 0.100 M potassium permanganate stock solution would be needed to make 100 mL of 0.0250 M potassium permanganate?
8. Fill in the blank. The lowest vibrational energy level of the lowest electronic singlet state (S0) is referred to as the ___________________.
9. Which of the following is a substrate that is reduced?
10. Where does spin-lattice relaxation occur?
11. Complete the sentence. Fluorescence and phosphorescence can be used for detection of all of the following, EXCEPT:
12. In a chromatographic analysis of an unknown mixture, compound A has a retention time of 5.56 minutes and a baseline width of 0.87, and compound B has a retention time of 6.32 minutes and a baseline width of 0.53 minutes. Are these peaks resolved, and what is the resolution between the two peaks?
13. Which of the following typically exhibits the largest molar absorptivities?
14. Complete the sentence. All of the following are common carrier gases from gas chromatography, EXCEPT:
15. Which of the following is the equivalent of 4.3 ppm sodium ion (Na+) concentration?
16. Chemical interferences in atomic absorption that cannot be accounted for using a background correction, but can be minimized, include which of the following?
17. If 4.94 grams of KOH is dissolved in water to make a final volume of 2.0 L, what is the molarity of the solution?
18. When does intersystem crossing occur?
19. What is the most common support material for a packed GC column?
20. WCOT, SCOT, PLOT, and FSOT are all types of which of the following?
21. Why is a hollow cathode tube lamp necessary in atomic absorption?
22. What is the purpose of a monochromator?
23. Which of the following statements is true of the detection limit of an instrument?
24. Fill in the blank. NMR affects a molecule's ________________.
25. Whether an electron is in the triplet state or singlet state depends on which of the following?

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