Question

3. Give reason for the following observations.
(a) Naphthalene balls disappear with time without leaving any
solid.
(b) We can get the smell of perfume sitting several metres away.
in order of forces​

Answer 1

Answer:

*naphthalene balls disappear with leaving any solid because it is a deliquisent substance

*we can get the smell of perfume sitting several metres away because of diffusion

Explanation:

deliquisent substance absorbs moisture from the atmosphere to turn into liquid leaving no solid particles behind

particles of perfume which are in a gaseous state diffuses easily into the atmosphere as gases diffuse very easily

Answer 2

Answer:

Hey mate here is your answer.

Explanation:

 (a) Naphthalene balls disappear because of the process of sublimation at room temperature.

 (b) when the perfume is released it is changed into gaseous state so we could smell the perfume sitting several metres away.

 

                                     THANK YOU.