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At 100ºC the vapour pressure of a solution of 6.5 g of a solute in 100 g water is 732 mm. If Kb = 0.52, the boiling point of this solution will be:CorrectIncorrect
What is the molality of a solution containing 200 mg of urea (molar mass 60 g mol–1) dissolved in 40 g of water ?CorrectIncorrect
Solubility of which among the following substances in water increases slightly with rise in temperature?CorrectIncorrect
To observe an elevation of boiling point of 0.05°C, the amount of solute (Mol. Wt. = 100) to be added to 100 g of water (Kb=0.5) isCorrectIncorrect
The volume of ethyl alcohol (density 1.15 g/cc) that has to be added to prepare 100 cc of 0.5 M ethyl alcohol solution in water isCorrectIncorrect
pA and pB are the vapour pressure of pure liquid components, A and B, respectively of an ideal binary solution. If xA represents the mole fraction of component A, the total pressure of the solution will beCorrectIncorrect
A 5.2 molal aqueous solution of methyl alcohol, CH3OH is supplied. What is the mole fraction of methyl alcohol in the solution?CorrectIncorrect
The molality of a urea solution in which 0.0100 g of urea, [(NH2)2CO] is added to 0.3000 dm3 of water at STP isCorrectIncorrect
1.00 g of non-electrolyte solute (molar mass 250 g mol–1) was dissolved in 51.2 g of benzene. If the freezing point depression constant, Kf of benzene is 5.12 K kg mol–1, the freezing point of benzene will be lowered byCorrectIncorrect
A solution has 1 : 4 mole ratio of pentane to hexane. The vapour pressure of pure hydrocarbons at 20°C are 400 mm Hg for pentane and 120 mm Hg for hexane. The mole fraction of pentane in the vapour phase would beCorrectIncorrect