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6. What does a solid stationary phase separate compounds by?
- relative solubility
- adsorption
- absorption
7. Name the stationary phase in thin layer chromatography?
- inert gas
- thin layer of adsorbent on inert support
- thin layer of solid inside capillary tubing
- liquid solvent
8. Why is it important to seal the jar containing the TLC plate?
- to speed up evaporation of the solvent
- to allow the process to occur
- to slow the evaporation of the solvent from the TLC plate
- to prevent bacteria contaminating the sample
9. 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
10. What does a liquid stationary phase separate by?
- relative solubility
- adsorption
- absorption