of a dry gas?
10. What is the efect of temperature on: (a) Surface tension (b) Viscosity (c) Vapour pressure of liquid
15. Give reason:
a) Falling liquid drops are spherical
b) Evaporation takes place from the surface of liquid
c) It is more efficient to wash clothes in hot water than cold water
16. What happens to the vapour pressure of a solvent, when non volatile solute particles are dissolved in it?