JEE Advanced 2020 Chemistry question

ChemistrySolutionsJEE Advanced 2020

Liquids **A** and **B** form ideal solution for all compositions of **A** and **B** at . Two such solutions with 0.25 and 0.50 mole fractions of **A** have the total vapor pressures of 0.3 and 0.4 bar, respectively. What is the vapor pressure of pure liquid **B** in bar?

Answer: 0.2

Solution

Raoult's law: . For : . For : $0.4 =

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Question ID VK-033817