Write true of false for each statement:

(a) The temperature of a substance remains unaffected during its change of state.

(b) Ice melts at 100°C.

(c) Water at 100°C has more heat than steam at 100°C.

(d) Evaporation of a liquid causes cooling.

(e) Water evaporates only at 100°C.

(f) Boiling takes place at all temperatures.

(g) Evaporation takes place over the entire mass of the liquid.

(h) The process of a gas converting directly into solid is called vaporization.

(i) At high altitudes, water boils above 100°C.

(j) The melting point of ice is 0°C.

Match the following

State three properties of molecules of matter.

What do you mean by inter-molecular spaces? How do they vary in different states of matter?