On Celsius scale the freezing point of water is taken as ___________________.

Condensation takes place by ______________________________.

Carbon dioxide gas at  ________________ temperature and under high pressure can be transformed into a solid which appears like ice.

When freezing occurs ____________________

The state of matter succeeded in obtaining by supercooling a gas of extremely low density is called ________________________.

A gas can be made to ____________________ on heating and cooling.

Which of the following are correct :

(a) The term ‘vapour’ is used for those gases which exist in the liquid form at room temperature.

(b) The term ‘gas’ is used for those gases which exist in the liquid form at room temperature.

Which of the following are correct :

(a) Evaporation is a surface phenomenon.

(b) Boiling is a bulk phenomenon.

Match the entries in Column 1 with entries in Column 2:                                               

Which of the following are correct :

(a) The temperature of both steam and boiling water is the same.

(b) Steam causes more severe burns than boiling water.

(c) Steam contains extra heat energy in the form of latent heat of vaporization.