The process by which a substance absorbs moisture upon exposure to atmosphere is called?
Correct answer: D. Deliquescence
- A. Efflorescence
- B. Dehydrogenation
- C. Desalination
- D. Deliquescence
Explanation
Deliquescent substances absorb water vapour from the atmosphere and may dissolve in the absorbed water. Efflorescent substances show the opposite behaviour by losing water of crystallisation to the atmosphere. Students most likely choose efflorescence because both terms involve moisture and crystalline substances, but their directions are opposite.
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About Properties of Liquids
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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