Question

give reason :-

(a) Naphthalene balls disappear with time without learing any solid. (b) a gas exerts pressure on walls of containes





Please help me

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Answer 1

A. Naphthalene balls disappear because it undergoes sublimation process i.e. it converts directly from solid to vapour state.

B. Particles of gases have high kinetic therefore they strike with the walls of the container and exerts pressure.

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