Question

Capillary action is due to the

• A. Surface tension
• B. cohesion of the liquid
• C. adhesion of the liquid molecules and the molecules on the surface of solid
• D. All options are correct

Answer 1

Answer:

D. All options are correct

51. Capillary action is due to the combined effects of surface tension, cohesion of the liquid, and adhesion between liquid molecules and the solid surface. As a result, a liquid rises or is drawn into a narrow tube, defying gravity. Surface tension causes a distinct meniscus at the liquid's surface, while cohesion maintains the continuous column of liquid. Adhesive forces between the liquid and solid surfaces pull the liquid upward. Capillary height is given by: $h= \frac{4\sigma cos\theta}{ \rho gd}$