Distillation and fractional distillation.

Give the principle of separation in fractional distillation.

Numer of fractions on fractional distillation of mixture of:

Under what conditions do we use fractional distillation ?

Absolute alcohols ( 100% ethanol) are prepared from rectified spirit ( 95% ethanol) by mixing a suitable amount of …….. And subjected to fractional distillation (azeotropic distillation).

Fractional distillation is suitable for separation of miscible liquids with a boiling point difference of about 25 K or less. What part of fractional distillation apparatus makes it efficient and possess an advantage over a simple distillation process. Explain using a diagram.

Why is it not possible to obtain pure ethanol by fractional distillation ? What general name is given to binary mixture which show deviation from Raoult's law and whose omponents cannot be separted by fractional distillation. How many types of such mixture are there?

Define Distillations

Ethanol cannot to concentrated by fractional distillation because :

Absolute alcohol cannot be prepared by fractional distillation of rectified spirit since: