Distillation is the process in which                 Fractional distilliation is done by addingliquid get vapourised and after              sort of material into the column that    cooling and it gets back into liquid                 that  the vapor travels before      state                                                           being cooled and  condensed

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Distillation is the process in which the volatile (liquids that evaporate) is separated from non volatile impurities.
In fractional distillation Liquids that evaporate at different boiling points are separated by means of fractional column.