Distinguish between the three states of matter with respect to the following properties:
$(a)$ Density
$(b)$ Diffusion
$(c)$ Particle motion

$(a)$ Conversion of solid to vapour is called sublimation. Name the term used to denote the conversion of vapour to solid.
$(b)$ Conversion of solid state to liquid state is called fusion; what is meant by latent heat of fusion?

State one difference between a gas and a vapour.

$(a)$ Explain the effect of temperature on the movement of particles of matter.
$(b)$ Give a reason why we get the smell of hot sizzling food even when we are metres away from it?

$(a)$ Define evaporation. Out of nylon and cotton clothes,which will be more comfortable during summer and why?
$(b)$ Are evaporation and boiling the same? If not,then why?

Choose the correct statement from the following: