How high a liquid will rise up a narrow tube as a result of capillary action depends on ________.
A)the magnitudes of cohesive forces in the liquid and adhesive forces between the liquid and the tube, and gravity
B)gravity alone
C)only the magnitude of adhesive forces between the liquid and the tube
D)the viscosity of the liquid
E)only the magnitude of cohesive forces in the liquid

Question

Quizplus · Accepted Answer

Capillary action is the ability of a liquid to flow in narrow spaces without the assistance of external forces. The height to which the liquid rises up a narrow tube depends on the balance of cohesive forces (attraction between molecules of the same liquid) and adhesive forces (attraction between molecules of the liquid and the tube) against gravity. The magnitude of cohesive and adhesive forces both play a role in determining the height of the liquid column in the tube. Therefore, option A is the correct answer. Options B, C and E are incorrect because they do not take into account the role of adhesive forces. Option D is also incorrect because the viscosity of the liquid affects the rate of flow, but not the height to which it rises.

How High a Liquid Will Rise Up a Narrow Tube