Question

2. Name the following:

a. A solid that melts at 0oC: ____________

b. A gas that can be liquefied under pressure at ordinary temperature: _________

c. A substance that exists as a solid at ordinary temperature but changes to vapour on

heating: _____________





3. Fill in the blanks:




a. A vapour on cooling changes into _________ and further cooling changes into _________.

b. Matter changes from one state to another either by raising the _______ or lowering

the_________.

c. A change in which a solid on heating directly changes into gas state is called ________.

d. The inetermolecular spaces are _________ in gaseous and _________ in solids.​

Answer 1

Answer:

2.

a) Water

b) Carbon dioxide, LPG, etc.

c) Iodine, Camphor, Naphthalene, etc.

3.

a) liquid, solid

b) temperature (or) pressure

c) Sublimation

d) very large, negligible