Question

4 differences between distillation and fractional distillation

Answer 1

Simple distillation

Fractional distillation

Simple distillation is used when the boiling points of chemicals in a mixture having large differences (more than 25°C).

Fractional distillation is used when the boiling points of chemicals in a mixture are close to each-other, usually within 77°F (25°C).

No fractionating columns used as the difference in the boiling point of mixture is large

Fractionating columns used  to separate the mixtures.

E.g. Process used in separating kerosene and petrol

E.g. Process used in the separation of Crude Oil into useful fractions


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Answer 2

In fractional distillation 2 or more substances are used.
In fractional distillation is carried out on the basis of different boiling points.
In fractional distillation, fractional column is used.
Distillation is a simpler process than fractional distillation.