Intro to Spectroscopy (UV-Vis, IR) - Problem Set

Q. In UV-Vis spectroscopy, what does a higher absorbance value indicate?
  • A. Lower concentration of the analyte
  • B. Higher concentration of the analyte
  • C. Higher wavelength of light
  • D. Lower path length of the sample
Q. What does a broad peak in an IR spectrum typically indicate?
  • A. Strong hydrogen bonding
  • B. Weak molecular interactions
  • C. High molecular weight
  • D. Low concentration
Q. What is the main advantage of using a Fourier Transform Infrared (FTIR) spectrometer over a traditional IR spectrometer?
  • A. Higher resolution
  • B. Faster data acquisition
  • C. Lower cost
  • D. Simpler operation
Q. What is the typical range of wavelengths for UV-Vis spectroscopy?
  • A. 100-400 nm
  • B. 400-800 nm
  • C. 200-800 nm
  • D. 800-2500 nm
Q. What type of molecular vibrations are primarily observed in IR spectroscopy?
  • A. Rotational transitions
  • B. Electronic transitions
  • C. Vibrational transitions
  • D. Nuclear transitions
Q. Which instrument is commonly used to measure IR spectra?
  • A. Spectrophotometer
  • B. Chromatograph
  • C. Mass spectrometer
  • D. NMR spectrometer
Q. Which type of bond is most commonly analyzed using IR spectroscopy?
  • A. C-H bonds
  • B. C-C bonds
  • C. N-H bonds
  • D. O-H bonds
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