Question

1. Give reasons for the following:-
(a) Solids have a definite shape and are highly rigid, while gases have no definite shape and are least rigid.
(b) Sugar can be distinguished from talcum powder using water.
(c) Water on freezing turns into ice.
(d) A bottle of perfume on opening evolves an odor which can be sensed over a long distance.
(e) All liquids have no definite shape.

2. Complete the statements given below by selecting the correct words:-
(a) Solids and liquids have a definite _________but gases do not. [mass, shape, volume]
(b) The space between atoms in ______ is maximum while in _____ is minimum. [solids, liquids, gases]
(c) Conversion of a vapors into a liquid is called____________[ vaporization, condensation, freezing]
(d) _____________is an example of a crystalline substance. [wax, sugar, tea]

3. State which of the following statements are false. If false write the correct statement.
(a) Solids are highly compressible and rigid.
(b) Atoms/molecules in gases move only about their own positions.
(c) The conversion of water to ice is called freezing.
(d) All gases occupy all the available space.
(e) Liquids have high diffusibility.

Answer 1

Answer:

(2) a, mass

b, solids

c,freezing

d,wax

(3)a,t

b,f

c,t

d,t

e,f