i. lesser

The temperature at which solid melts to become a liquid at the atmospheric pressure is called its melting point. Higher the melting point of a substance, more easily the substance gets converted into a liquid which has less force of attraction between its particles.

ii. vapour

Boiling is a bulk phenomenon. Particles from the bulk of the liquid gain enough energy to change into the vapour state.

iii. Sublimation

Naphthalene undergoes the process of sublimation. Sublimation is a change of state directly from solid to gas without changing to liquid state or vice versa.