Question

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.​

Answer 1

Explanation:

(a) napthalene balls disappear because they can be sublimed

(b) because the smell of perfume mixes with air and we can smell it sit

ting several metres away

please mark as brainlist

Answer 2

$\large\red{\textbf{\underline{\underline{Here\:is\:your\:Answer :- }}}}$

(a) At room temperature, naphthalene balls undergo sublimation wherein they directly get converted from a solid to a gaseous state without having to undergo the intermediate state, i.e., the liquid state.

(b) Molecules of air move at a higher speed and have large intermolecular spaces. Perfumes comprise of flavoured substances that are volatile which scatters quickly in air, becoming less concentrated over a distance. Hence we are able to smell perfume sitting several metres away.

Hope it Helps !!