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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. In non-linear molecules, how many fundamental vibrations may exist (let n = the number of atoms)?
2. Fast atom bombardment (FAB) and secondary ion mass spectrometry (SIMS) are useful techniques for
3. If cell length is held constant, a Beer's Law plot of a given analyte will result in a linear relationship between
4. Identify this compound.
5. Higher mass satellites of molecular ions occur as a result of
6. Which of the following correctly describes the relative intensities of splitting an NMR peak?
7. In general, when calculating empirical values for λ max, the result of adding a substituent group is a
8. The molecular ion for peak in a spectrum of iso-butane
9. Which of the following is in correct order of decreasing IR stretching frequency?
10. Which of the following primarily exhibits n to π * electronic transitions?
11. Identify this compound.
12. 12C and 16O nuclei cannot be observed by NMR spectroscopy. Why?
13. Beta-carotene is a highly absorbing chromophore. Which solvent would be the best choice for analysis?
14. Why are some fundamental vibrations not observed?
15. Which of the following describes the correct relationship between absorbance and transmission?
16. Identify this compound.
17. Keeping all other variables the same, as bond strength decreases,
18. Within the 3500-3300 cm-1 region, how can primary, secondary, and tertiary amines be distinguished?  
19. 1. The presence of M-15, M-29, and M-43 mass spectral peaks correspond to
20. In order for an IR vibration to be allowed, what condition must be met?
21. Adjacent protons can act as magnets and affect the amount of radiation required for proton resonance in NMR. This interaction causes
22. 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:
23. The stretching frequency of which functional group would be most useful in the detection of metal ligand complexes?
24. The peaks in a UV-Vis spectrum are broad because
25. Quadrupole and ion trap mass analyzers isolate ions for analysis by

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