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JEE Main Chemistry question

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The osmotic pressure of 0.4% urea solution is 1.66 atm and that of a solution of sugar is 2.46 atm. When both solutions are mixed, the osmotic pressure of the resultant solution will be

Answer: (B)

Solution

When equal volumes of the two solutions are mixed, the total volume doubles, so each solute's contribution to the osmotic pressure is halved:

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Question ID VK-143204