Question

1. Give reason for the following
(a) Naphthalene balls evaporate with time without leaving
any solid.
(b) we can get the small of perfume sitting several moders
of away.​

Answer 1

Answer:

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

b) When perfume is released it quickly changes into vapour. The kinetic energy of gas molecules is high & the rate of diffusion is high. Hence we can smell the perfume sitting several metres away.

I hope it helps u....❤️

Answer 2

a) Naphthalene balls evaporate with time without leaving

any solid.

This happens due to sublimation

Napthalene balls sublime

Sublimation is a process in which the solid is directly converted into gas without undergoing the liquid state

(b) we can get the small of perfume sitting several moders

of away.​

When perfume is released it quickly changes into vapour. The kinetic energy of gas molecules is high & the rate of diffusion is high. Hence we can smell the perfume sitting several metres away.

I hope this helps ( ╹▽╹ )