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JEE Main Chemistry question

ChemistrySolutionsJEE Main

Two liquids and form an ideal solution at 300 K, vapour pressure of the solution containing 1 mol of and 3 mol of is 550 mmHg. At the same temperature, if 1 mol of is further added to this solution, vapour pressure of the solution increases by 10 mmHg. Vapour pressure (in mmHg) of and in their pure states will be, respectively [AIEEE 2009]

Answer: (C)

Solution

For 1 mol + 3 mol : , so , i.e. . After adding 1 more mol (1 mol + 4 mol ), vapour pressure becomes

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Question ID VK-143007