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

hi mate

here is your answer

A) naphthalene balls disappear with time without leaving any solid because they go under sublimation and directly changes to gas without getting converted into liquid

B) the particles of perfume are carried away by the air and as they possess kinetic energy , we get the smell of perfume several metres away

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Answer 2

(a) the reason behind it is that the naphthalene ball have a tendency to convert into gas with requiring less energy so it take energy from the environment and disappear.

(b) there is a property of particle of matter that the particle of matter is continuously moving and so the smell of perfume reached at long meters away..

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