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CHEM205 Final Exam - Spectroscopy
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MCQs on the introduction of the theory, instrumentation, application of spectroscopic techniques. Topics include mass spectrometry, ultraviolet-visible (UV-Vis) spectroscopy, infrared (IR) spectroscopy, and nuclear magnetic resonance (NMR) spectroscopy.
 

CHEM205 Final Exam - Spectroscopy
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25 Questions

1. Which of the following statements about UV-Visible spectrophotometers is NOT true?
2. Which of the following is NOT a reason why tetramethylsilane (TMS) is often used for a reference in NMR spectroscopy?
3. The five peaks in a mass spectrum of chlorine can be attributed to
4. Quadrupole and ion trap mass analyzers isolate ions for analysis by
5. Basic UV-Visible spectroscopy is designed to analyze samples in what phase?
6. Identify this compound.
7. Which of the following describes the correct relationship between absorbance and transmission?
8. Calibration of a mass spectrometer is
9. The peaks in a UV-Vis spectrum are broad because
10. An absorbance value of zero corresponds to 100% transmittance. What does an absorbance value of 2 correspond to?
11. The x-axis of a UV-Vis spectrum is usually reported as wavelength in nm. The y-axis can be reported as
12. The Woodward-Fieser Rules are useful for
13. The stretching frequency of which functional group would be most useful in the detection of metal ligand complexes?
14. Why are some fundamental vibrations not observed?
15. Which of the following is true about sector mass analyzers?
16. The mass spectra of fluorine
17. In a mass spectrum of an alcohol, the molecular ion is usually small or non-existent due to
18. Beta-carotene is a highly absorbing chromophore. Which solvent would be the best choice for analysis?
19. Identify this compound.
20. Pump-probe experiments in infrared spectroscopy can result in information about
21. Magnetic Resonance Imaging (MRI) is an application of NMR spectroscopy in which of the following ways?
22. Nuclei with even masses and odd numbers of protons and neutrons
23. When analyzing a sample by UV-Vis spectroscopy, if the signal to noise ratio is too low, the results may not be reliable. All of the following are ways to counter this, except:
24. 12C and 16O nuclei cannot be observed by NMR spectroscopy. Why?
25. In general, when calculating empirical values for λ max, the result of adding a substituent group is a

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