An Azeotropic solution of two liquids has boiling point lower than either of them, when it_____________?
Correct answer: D. Shows positive deviation from Raoult's law
- A. Is saturated
- B. Is unsaturated
- C. Shows negative deviation from Raoult's law
- D. Shows positive deviation from Raoult's law
Explanation
Positive deviation from Raoult's law raises the total vapour pressure above the ideal value, so the liquid boils at a lower temperature than either pure component. This produces a minimum-boiling azeotrope.
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