Give reason for the following observations a) naphthalene balls dissappear with time without leaving any solid b) we can get smellof perfume sitting several metres away

Give reason for the following observations a) naphthalene balls dissap

1.	Give reason for the following observations a) naphthalene balls dissappear with time without leaving any solid b) we can get smellof perfume sitting several metres away
Answer» Naphthalene balls disappear due to sublimation process. In this no solid residue is left and solid is DIRECTLY changed in gaseous state.We can smell the perfume several metres away because of diffusion of gas. because the molecules of perfume DIFFUSE in AIR and air or gas travels here and there.