Question

what is sublimation and fractional distillation

Answer 1

When anything solid turns into a gas without first becoming liquid, that's sublimation.

Fractional distillation is the separation of a mixture into its component parts, or fractions, separating chemical compound by their boiling point by heating them to a temperature at which one or more fractions of the compound will vaporize.

Answer 2

sublimation is the process in which solid changes to vapour directly.