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If two liquids A and B form a minimum boiling azeotrope at some specific composition, then which statement among the following is correct?

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A solution of urea (molar mass 60 g mol-1) boils at 100.20°C at the atmospheric pressure. if Kf and Kb for water are 1.86 and 0.512 KKgmol-1 respectively. The freezing point of the solution will be
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If the KH values for Ar(g),CO2(g),HCHO(g) and CH4(g) respectively are 40.39,1.67, 1.83×10-5 and 0.413, then identify the correct increasing order of their solubilities.
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When 36 g of a non-volatile, non-electrolytic solute have the empirical formula CH2O is dissolved in 1.2 kg of water, the solution freezes at -0.93°C. The molecular formula of the solute is (Kf of water =1.86 K kg mol-1)
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The elevation in the boiling point of an aqueous solution of NaCl is 0.01°C. If its van't Hoff factor is 1.92, the molality of NaCl solution is ___(Kb for water =0.52 K kg mol-1)
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The molal elevation constant is the ratio of Elevation in boiling point to
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Benzene and toluene form an ideal solution over the entire range of composition. The vapour pressure of pure benzene and toluene at T K are 50 mmHg and 40 mmHg, respectively. What is the mole fraction of toluene in vapour phase when 117 g of benzene is mixed with 46 g of toluene?

(Molar mass of benzene and toluene are 78 and 92 g mol-1, respectively)