Question

The level of liquid inside the capillary tube rises when it is kept in liquid. Give reason.

Answer 1

The level of liquid inside the capillary tube rises when it is kept in liquid because the adhesive force between the liquid and the capillary tube is greater than the cohesive force between the liquid molecules.

Answer 2

Adhesion of water to the walls of a vessel will cause an upward force on the liquid at the edges and result in a menisus which turns upward.

The surface tension acts to hold the surface intact.

Capillary action occurs when the adhesion to the walls is stronger than the cohesive forces between the liquid molecules.