Explain why alcohol produces a greater cooling effect on skin that water does.

Separate portions of chloroform and water at the same temperature are poured on your hands. The chloroform feels colder. Account for this in terms of attractive forces.

Why is cooling caused in evaporation?

Explain the term surface tension.

Will water boil at a higher temperature at sea level or on the top of a mountain ?

Explain briefly the boiling point of a liquid. What is the effect of change in external pressure on the boiling point?

What do you understand by vapour pressure of solids?

Why does the temperature of the boiling liquid remain constant?

What do you mean by state of dynamic equilibrium?