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5 Colligative Properties

Class 12 Chemistry के इस tag से जुड़े questions। हर question के साथ chapter, topic, level और difficulty दी गई है।

ChemistryWhich solution will have the lowest freezing point if all have molality 0.1 m and dissociation is complete?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 16MediumChemistryA 0.2 m solution of a nonelectrolyte has ΔTb = 0.102 K. In the same solvent, what will be the approximate ΔTb of a 0.1 m completely dissociated NaCl solution?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 16MediumChemistryIf the temperature is increased while measuring the osmotic pressure and the concentration remains constant, what happens to the osmotic pressure?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 16EasyChemistryIf the mole fraction of the solute in a solution is 0.05 and the vapour pressure of the pure solvent is 100 mmHg, what is the approximate vapour pressure of the solution, assuming the solute is non-volatile?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 15MediumChemistryWhich solution will have the highest osmotic pressure if all have molarity 0.1 M, the temperature is the same, and dissociation is complete?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 16MediumChemistryA solution has a freezing-point depression of 0.372 K. In the same solvent and at the same molality, if the solute completely forms dimers, what will be the new freezing-point depression?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 16MediumChemistryA solution contains 18 g of glucose in 1 kg of water. The molar mass of glucose is 180 g mol⁻¹ and Kf = 1.86 K kg mol⁻¹. What is the depression in freezing point?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 16MediumChemistryWhich of the following is not a colligative property?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 16EasyChemistryA solute is found to have a van’t Hoff factor (i) equal to 0.5. What is the most likely explanation?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 16MediumChemistryIf a solvent has a higher Kf, which conclusion is correct for the same molality of a non-volatile solute?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 15EasyChemistrySolution A contains 0.1 m glucose and solution B contains 0.1 m completely dissociated NaCl. Which solution will have the higher boiling point?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 15MediumChemistryIn which of the following situations is the van’t Hoff factor i expected to be less than 1?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 15MediumChemistryA 0.05 M solution has the same osmotic pressure as a 0.10 M urea solution. At the same temperature, what is the van’t Hoff factor of that solute?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 15MediumChemistryIf the relative lowering of vapour pressure of a solution is 0.02, what is the approximate mole fraction of the solute in a dilute solution?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 15EasyChemistryTwo equimolal solutions are given. The first contains completely dissociated BaCl₂ and the second contains glucose. What is the ratio of their freezing-point depressions?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 15MediumChemistryIf the elevation in boiling point of a solution is greater than the expected value, which reason is most suitable?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 15MediumChemistryWhich colligative property is directly used to explain the bursting or shrinking of blood cells?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 15EasyChemistryAt the same temperature, what is the ratio of the osmotic pressures of 0.1 M urea and 0.1 M completely dissociated K₂SO₄ solutions?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 15MediumChemistryA solution contains 0.2 mol of a non-volatile solute in 1 kg of water. If 50% of the solute molecules form dimers, what is the effective molality?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 15HardChemistryUnder which condition will a CaCl2 solution show a greater depression in freezing point than an equimolal NaCl solution?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 15Medium