Question

5. Explain the following phenomena we observe in our everyday life, with the help of particle theory:
(i) A gas fills the entire vessel in which it is kept.
(ii) We can easily move our hand through air, but to do the same in a solid block of wood, we need to learn the special karate skills.
(iii) We get the fragrance of the flowers from a bouquet kept in a far-away corner of the room.

Answer 1

Answer: (i) The force of attraction between particles of gas is negligible. Because of this, particles of gas move in all directions. Thus, a gas fills the vessel completely in which it is kept.

(ii) We can move our hands freely in air as its particles have a large inter molecular space. Wherein wood, the particles are tightly packed together and doesn’t allow free movement unlike air. Thus, we need special karate training to use a certain right amount of force.

(iii) We are able to sense the fragrance of a flower bouquet even from a far corner as, its scent travels in the thin particle of air and through our nose.

Explanation: