Rising of a wetting liquid in a capillary tube is due to__________________?
Correct answer: C. Adhesive forces
- A. Surface tension
- B. Cohesive forces
- C. Adhesive forces
- D. viscosity
Explanation
A wetting liquid rises because adhesive forces between the liquid and the capillary wall pull the liquid upward. Students may choose surface tension because it is involved in capillary action, but adhesion to the wall is the force responsible for the rise of a wetting liquid.
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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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