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JEE Main 2012 Chemistry question

ChemistrySolutionsJEE Main 2012

Liquids A and B form an ideal solution. At 30°C, the total vapour pressure of a solution containing 1 mol of A and 2 mol of B is 250 mmHg. The total vapour pressure becomes 300 mmHg when 1 more mol of A is added to the first solution. The vapour pressures of pure A and B at the same temperature are

Answer: (3)

Solution

and , i.e. $

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Question ID VK-103581