Question

give reason :
a) nephthalene balls disappear with time without leaving any solid
b)we canget the ssmell of perfume sitting several meters away​

Answer 1

Answer:

Hey mate here is your answer.....

a)Naphthalene balls disappear with time without leaving any solid because they undergo sublimation

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.

Hope it helps you.....

Answer 2

a) Because naphthalene balls undergo sublimation that is changing from soils to gas directly and vice versa.

b) Because the particles of perfume get difused with the particles of gases due to which we can get the smell of perfume sitting several meters away.

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