surface tension and viscosity

Which is not the characteristic of hydrophobic sols? a. They are highly susceptible to coagulation by addition of electrolytes. b. They have nearly the same surface tension and viscosity as that of dispersion medium. c. Their stability is due to both electric charge and salvation of the particles. d. Sol particles can be seen under ultramicroscope.

Surface tension is

Surface tension is

Surface tension acts

The fundametal quantity which has the same power in the dimensional formula of surface tension and coefficient of viscosity is

What is the effect of temperature on : (a) Density , (b) Surface tension , (c ) Viscosity and (d) Vapour pressure of a liquid ?

Define surface tension and surface energy. Write units and dimensions of surface tension. Also prove that surface energy is numerically equal to the surface tension.