A technique of partition chromatography in which the solvent is in a pool at the bottom of container_______________?
Correct answer: B. Ascending chromatography
- A. Adsorption chromatography
- B. Ascending chromatography
- C. Radial chromatography
- D. Descending chromatography
Explanation
In ascending chromatography, the solvent is placed in a pool at the bottom and rises upward through the stationary phase by capillary action. Students may choose descending chromatography, but in that method the solvent reservoir is above the stationary phase and the solvent moves downward.
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Liquid behavior depends on intermolecular forces, which produce surface tension, viscosity, capillary action and a definite volume without a fixed shape. The topic also covers vapor pressure, evaporation, boiling point and the effect of temperature and external pressure, while distinguishing evaporation at the surface from boiling throughout the liquid.
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