Azeotropes: Azeotoropes are binary mixture having the same composition in liquid and vapour phase and boil at constant temperatures.
Azeotropes showing negative deviation from Raoult’s law form maximum boiling azeotropes at a specific composition, e.g. azeotrope formed from nitric acid and water. Azeotropes showing positive deviation from Raoult’s law form mini¬mum boiling azeotropes at a specific composition, e.g. ethonol water, mixture.
