MHT CET 2026 Chemistry question
5 g urea is dissolved in 100 g water. Find the amount of glucose to be dissolved in 120 g of water so that the boiling points of both solutions will be the same. [Molar mass of urea =60 g & Molar mass of glucose = 180 g ]
Answer: (C)
Solution
Elevation of boiling point , and both solutions use the same solvent (water), so equal boiling points mean equal molality. Molality of urea = mol/kg. For glucose, let the mass be w g: molality = . Equating,
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