Question

Give reason for:-
a) Napthalene Balls disappear with time without leaving any solid.

Answer 1

Sublimation is the process of solid directly converts into vapours. Without converting into liquid state.

Naphthalene balls undergo Sublimation due to which it converts directly into vapours and disappear into air without leaving any solid.

Another example is The particles of perfume diffused rapidly into the air and its smells can be felt while sitting several meters away.

Hope it will help you!

Answer 2

Explanation:

sublimation ..... sublimation is the process of converting directly solid into gaseous state.....,... without changing into liquid state

napthalene balls undergo sublimation. so there is no solid left behind.

another example is camphor ,when you burn the camphor it will burn and no solid will be left.camphor also undergoes sublimation