Question

There is a mixture of three liquids A,B C having blue colour, no colour red colour with boiling points 373K , 350K, 313 K respectively. Suggest a

scheme for their separation

Answer 1

Mixture of three liquids with different boiling points can be separated by fractional distillation.
In this process, you heat the mixture of liquids in a special type of apparatus. The mixture boils and change into gaseous state. At first, the component C will boil as it has low boiling point. It vapours can be collected from fractional distillation column and can be condensed to obtain liquid C. After that, liquid B will boil as the boiling mixture reaches its boiling point. Similarly vapours of B can be collected and condensed to obtain liquid B. At the end, vapours of liquid A will rise as its boiling point is highest. Its vapours can be collected from column and condensed to obtain liquid A. Hence three liquids can be collected separately.