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

(N/A) Pure ethanol cannot be obtained by fractional distillation because it forms a constant-boiling mixture (azeotrope) with water at a concentration of approximately $95.4\%$ ethanol by mass.
This mixture boils at a constant temperature and cannot be separated into its pure components by simple distillation.
Such mixtures are generally called Azeotropes.
There are $2$ types of such mixtures:
$(i)$ Minimum boiling azeotropes
(ii) Maximum boiling azeotropes.