why during fractional distillation we dont use the first sol

why during fractional distillation we don\'t use the first solution which is distilled

Solution

During fractional distillation generally we aim to get pure distilled from mixture.when we do so then the first drop you get that may have both the mixture or some forrun fractions from column which may interfere with our pure fraction.To avoid this forrun impurities we generally discard the first solution which is coming from colum.