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MHT CET Chemistry question

ChemistrySolutionsMHT CET

Vapour pressure of pure 'A' is 70 mm of Hg at 25 ℃. It forms an ideal solution with 'B' in which mole fraction of 'A' is 0.8. If the vapour pressure of the solution is 84 mm of Hg at 25 ℃, the vapour pressure of pure 'B' at 25 ℃ is

Answer: (C)

Solution

: , so

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Question ID VK-061251