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Chemistry - Liquid Solution Question with Solution | TestHub

ChemistryLiquid SolutionRaoult's LawMedium2 minPYQ_2004

ChemistryMediumsingle choice

Addition of a non-volatile solute causes lowering in vapour pressure of a solvent from 0.8 atm to 0.2 atm. What is the mole fraction of solvent?

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Answer:

Solution:

From Raoult's law, $\frac{P - P _{s}}{P} =$ mole fraction of solute $(x_{A})$ $∴ x_{A} = \frac{0.8 - 0.2}{0.8} = \frac{0.6}{0.8} = 0.75$ Hence, mole-fraction of solvent $= 1 - 0.75 = 0.25$

Stream:JIPMERSubject:ChemistryTopic:Liquid SolutionSubtopic:Raoult's Law

⏱ 2mℹ️ Source: PYQ_2004

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