Other questions in this quiz

2. Which is NOT a limitation of thin layer chromatography?

  • unknown compounds have no Rf value for comparison
  • similar compounds have similar retention times
  • similar compounds have similar Rf values
  • may be difficult to find a solvent which will separate all components

3. What does a liquid stationary phase separate by?

  • relative solubility
  • adsorption
  • absorption

4. Name the stationary phase in thin layer chromatography?

  • thin layer of adsorbent on inert support
  • thin layer of solid inside capillary tubing
  • inert gas
  • liquid solvent

5. What is the benefit of coupling gas chromatography with mass spectrometry

  • gas chromatography separates compounds and mass spectra can be compared to a database
  • both the retention time and mass spectra can be used to improve the reliability of the identification
  • mass spectroscopy separates the compounds and retention times can be compared to a database

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