Answer:
The solution or mixture having same
composition in liquid as well as in vapour phase and boils at a constant
temperature is known as azeotropes. Due to constant composition it
Can?t be separated by fractional
distillation. There are two types of azeotropes
(i) Minimum boiling
azeotropes Solutions which show large positive deviation from Raoult's law
form minimum boiling azeotropes at a specific composition, e.g., ethanol ?water
mixture
(ii) Maximum boiling azeotropes
Solutions which show large negative deviation from Raoult's law form maximum
boiling azeotropes. e.g., solution having composition 68% HNO3 and
32% water by mass.
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