Define:Surface tension.

What do you mean by surface tension? State dimension of surface tension. Why the viscosity of a liquid decreases with increase of temperature.

Define surface density of electric charge

Colligative property is 1.Osmotic pressure 2. Vapour pressure 3.Cohesion force 4.Surface tension

Two drops of mercury, each having a radius R, coalesce to from a large drop. Determine the ratio of their surface energies before and after the change. Surface tension of mercury = T.

What is Capillery action? Give molecular interpretation of surface tension