Question

explain fractional distillation

Answer 1

Fractional distillation is the separation of a mixture into its component parts, or fractions. Chemical compounds are separated by heating them to a temperature at which one or more fractions of the mixture will vaporize. It uses distillation to fractionate. Generally the component parts have boiling points that differ by less than 25 °C from each other under a pressure of one atmosphere. If the difference in boiling points is greater than 25 °C, a simple distillation is typically used.

Answer 2

The method used to separate the components of two or more miscible liquids for which the difference in their boiling points is less than 25K is called the fractional distillation method. Example --- separation of different gases from air.