Question

If two liquids $A$ and $B$ form 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 increases 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 $B-B$

Answer 1

Answer: (D)

The solutions which show a large positive deviation from Raoult’s law (i.e. $A-B$ interactions are weaker than those between $A-A$ or $B-B$) form minimum boiling azeotrope at a specific composition.