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If two liquids A and B from minimum boil...

If two liquids A and B from minimum boiling azeotrope at some specific composition then

A

A - B interactions are stronger than those between A - A or B - B

B

Vapour pressure of solution increase because more number of molecules of liquids A and B can escape from the solution

C

Vapour pressure of solution decreases because less number of molecules of only one of the liquids escape from the solution

D

A - B interactions are weaker than those between A - A or B - B

Text Solution

Verified by Experts

The correct Answer is:
D
For minimum boiling azeotrope there is an intermediate compositions of liquids for which boiling point of mixture is minimum. At this composition vapour pressure of the solution is maximum so those solution should show a positive deviation from Raoult’s law.
Thus A – B attractive force should be weaker than A – A and B – B attractive forces. ‘A’ and ‘B’ can escape easily from the solution, showing higher vapour pressure than expected value.
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