'W' g of a non-volatile electrolyte solid solute of molar mass 'M' gmol ^ -1 when dissolved in 100 mL water,...

Question

'W' g of a non-volatile electrolyte solid solute of molar mass 'M' gmol ^ -1 when dissolved in 100 mL water, decreases vapour pressure of water from 640 mm Hg to 600 mm Hg. If aqueous solution of the electrolyte boils at 375 K and K_b for water is 0.52 K kg mol ^ -1 , then the mole fraction of the electrolyte solute (x_2) in the solution can be expressed as (Given : density of water =1 g/mL and boiling point of water =373 K)

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JEE Main 2026 Chemistry question

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