Q2 Give reason for the following:
(a) Air exhibits nature of fluidity but stone does not.
(b) It is difficult to break iron rod than piece of chalk.
(c) Smell of perfume spreads rapidly in room.
Answers
Answer:
stone was solid so it was not exhibit air
Answer:
( a) a fluid is something that can flow and doesn't have a fixed shape. And attraction between molecules is lesser than that in solids. So as the air doesn't have a fixed shape and the attraction between particles are very less so it exhibit nature of fluidity.
Explanation:
( b ) Force of attraction between particles of chalks is less than force of attraction between particles of iron and because of weak forces of attraction in chalk piece, we are able to break it easily and it's difficult to break a piece of iron.
( c ) The perfume contains gas particles. And we know that the kinetic energy or the Movement of the gas particles is very fast( this process is known as diffusion)so when we spray perfume its particles moves in the air very fast and travels from one place to another very quickly.so it starts smelling all over the room.