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JEE Advanced 2022 Paper 2

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Question : 38

Total: 54

An aqueous solution is prepared by dissolving 0.1‌mol of an ionic salt in 1.8‌kg of water at 35∘C . The salt remains 90% dissociated in the solution. The vapour pressure of the solution is 59.724‌mm of Hg. Vapor pressure of water at 35∘C is 60.000‌mm of Hg. The number of ions present per formula unit of the ionic salt is

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