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1. IR spectroscopy is most useful for distinguishing:
2. Oxygen (O2) does not exhibit an IR spectrum because:
3. If IR spectroscopy were employed to monitor the oxidation of benzyl alcohol to benzaldehyde, which of the following would provide the best evidence that the reaction was proceeding as planned?
4. Which of the following chemical shifts could correspond to an aldehydic proton signal in a 1H–NMR spectrum?
5. The isotope 12C is not useful for NMR because:
6. In 1H–NMR, splitting of spectral lines is due to:
7. Compared to IR and NMR spectroscopy, UV spectroscopy is preferred for detecting:
8. Considering only the 0 to 4.5 ppm region of a 1H–NMR spectrum, how could ethanol and isopropanol be distinguished?
9. Before absorbing an ultraviolet photon, electrons can be found in:
10. In an IR spectrum, how does extended conjugation of double bonds affect the absorbance band of carbonyl (C=O) stretches compared with normal absorption?
11. Wavenumber is directly proportional to:
12. Two enantiomers will:
13. In a molecule containing a carboxylic acid group, what would be expected in a 1H–NMR spectrum?
14. The coupling coefficient, J, is:
15. The IR spectrum of a fully protonated amino acid would likely contain which of the following peaks?
I. A sharp peak at 1750 cm–1
II. A sharp peak at 3300 cm–1
III. A broad peak at 3300 cm–1
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