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JEE Main Chemistry question

ChemistrySolutionsJEE Main

The vapour pressure of benzene at a certain temperature is 640 mm of Hg. A non-volatile and non-electrolyte solid weighing 2.175 g is added to 39.08 g of benzene. If the vapour pressure of the solution is 600 mm of Hg, what is the molecular weight of solid substance?

Answer: (C)

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Question ID VK-143092