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Colligative Properties

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

ChemistryWhen 5 g of a non-dissociated solute is dissolved in 500 g of solvent, the boiling point rises by 0.052 K. If K_b = 0.52 K kg mol⁻¹, what is the molar mass of the solute?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 13MediumChemistryAmong aqueous solutions of equal molality, assuming complete dissociation, which solution will show the greatest depression in freezing point?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 13MediumChemistryA 0.1 m non-dissociated solution has a boiling-point elevation of 0.052 K. What will be the boiling-point elevation of a 0.1 m K₂SO₄ solution in the same solvent on complete dissociation?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 13MediumChemistryIn which situation will the observed molar mass of a solute be higher than its true molar mass?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 13MediumChemistryAmong aqueous solutions of equal molality, assuming complete dissociation, which will show the greatest depression in freezing point?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 13MediumChemistryWhich solution will have the lowest freezing point at equal molality, if all solutes behave ideally and are either completely dissociated or non-dissociated?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 13HardChemistryA 0.2 mol kg⁻¹ aqueous Na₂SO₄ solution is 50% dissociated. What is its effective molality, expressed as the total concentration of solute particles?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 13MediumChemistryWhen 2 g of a non-dissociated solute is dissolved in 250 g of water, the depression in freezing point is 0.186 K. If K_f = 1.86 K kg mol⁻¹, what is the molar mass of the solute?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 13MediumChemistryIf the vapour pressure of a pure solvent is 80 mmHg and that of the solution is 76 mmHg, what is the relative lowering of vapour pressure?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 13EasyChemistryA solution has a solute mole fraction of 0.08. Assuming that the solute is non-volatile, what is the relative lowering of vapour pressure?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 13EasyChemistryIn which situation will the molar mass of a solute determined from a colligative property be less than its true molar mass?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 13MediumChemistryWhat molarity of a CaCl₂ solution will be isotonic with a 0.3 M glucose solution, if CaCl₂ is assumed to dissociate completely?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 13MediumChemistryIn a solution of a non-volatile solute, which observation most clearly indicates association of solute molecules?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 13MediumChemistryWhich colligative property is particularly suitable for determining the molar mass of a solute when the solution is very dilute?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 13MediumChemistryFor a 0.1 m non-dissociated solution, the expected freezing-point depression is 0.186 K. The observed freezing-point depression is 0.279 K. What is the van’t Hoff factor i for the solute?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 13MediumChemistryIn a solution of an unknown solute, the van’t Hoff factor (i) is found to be much greater than 1. What is the most suitable explanation?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 14MediumChemistryIf the ebullioscopic constant K_b is larger, how will the elevation in boiling point behave for the same molality and the same van’t Hoff factor i?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 13EasyChemistryWhat happens to the vapour pressure of the solvent when the amount of a non-volatile solute in a solution is increased?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 14EasyChemistryA solution has van’t Hoff factor i = 2.2. If the boiling-point elevation calculated without dissociation is 0.05 K, what is the actual boiling-point elevation?Class 12Chapter 01: SolutionsLevel 14MediumChemistryA solute AB is 70% dissociated in solution. If AB dissociates as AB → A⁺ + B⁻, what is the van’t Hoff factor i?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 14Medium

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