Question

Give reasons of the following
1.Napthalene balls disappear in air completely with respected to time.
2.we can get the smell of perfume even it is in several metres away.

Answer 1

1. Naphthalene ball disappear because it show property of sublimation process in which solid directly convert into gas.

2. Because gas particle are not tightly packed and spread in surrounding and perfume is a type of gas.

Answer 2

answer-
1. Naphthalene balls show sublimation process.
2. naphthalene ball Disappears and flew in air. so, we can smell it from several metres away.


hope it will help you......