Question

give reasons for -
1.Naphthalene balls disappear with time without leaving residue .

2.We can get the smell of perfume sitting several meter away .

Answer 1

naphthalene balls disappear with time without leaving any Residue because they are sublimate which perform the process sublimation

the smell of perfume sitting several metres away will be carried out by the process diffusion

Answer 2

HEY USER !!

HERE IS UR ANSWER --

1. Napthalene balls disappear with time without leaving any residue because of sublimation. Sublimation is a process in which a solid directly changes into gaseous state.

2. We can get the smell of perfume sitting several meter away because of diffusion. Diffusion is a process of inter mixing of particles of one matter with other.