Question

Fill in the blanks with suitable words:
(a)The best evidence that the particles of matter are constantly moving comes from the studies of......... and ...........
(b) The smell of perfume gradually spreads across a room due to.......
(c) Solid, liquid and gas are the three .......of matter.
(d) At room temperature, the forces of attraction between the particles of solid substances are ......... than those which exist in the gaseous state.
(e) The arrangement of particles is less ordered in the ........ state. However,there is no order in the ......... state.

Answer 1

1. 'Diffusion' and 'Brownian motion' gives us the evidence that particles of matter are constantly in random motion.
2. The smell of perfume gradually spread across the room due to 'diffusion'.
3. Solid, liquid and gases are three 'states' of matter
4. The attraction between the particles of solid substances is 'much stronger' than the those which exist in the gaseous state.
5. The arrangement of the particles is less ordered in the liquid state and there is no order in the gaseous state.