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Pick out the correct statements This question has multiple correct options

1. The ratio of vapour pressure over solution phase on mixing two immiscible liquids is equal to ratio of their moles in vapour phase
2. The ratio of vapour pressure over solution phase on mixing two miscible liquids is equal to ratio of their moles in liquid phase
3. The ratio of vapour pressure over solution phase on mixing two miscible liquids is equal to ratio of the product of their vapour pressure and their moles fraction in a liquid phase
4. The ratio of vapour pressure over solution phase on mixing two miscible liquids is equal to ratio of the product of their vapour pressure and their mole fraction in vapour phase

Correct answer: The ratio of vapour pressure over solution phase on mixing two miscible liquids is equal to ratio of the product of their vapour pressure and their moles fraction in a liquid phase

Solution

In a miscible ideal solution, each component obeys Raoult’s law: partial vapour pressure is proportional to its mole fraction in the liquid phase and its pure vapour pressure. So the correct statement is the one that uses the product of vapour pressure and liquid mole fraction, not vapour-phase composition or immiscible behavior.

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