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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।

ChemistryFor two non-electrolyte solutions having the same molality, which solution will show the greater depression in freezing point?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 18EasyChemistryIf 1 g of a solute dissolved in 100 g of a solvent produces a boiling-point elevation of 0.1 K, what boiling-point elevation will be produced when 2 g of the same solute is dissolved in 200 g of the same solvent? Assume the solutions behave ideally.Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 12MediumChemistryIn molar-mass determination, colligative properties depend mainly on which factor?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 18EasyChemistryWhich colligative property is most suitable for determining the molar mass of a high-molar-mass polymer?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 18MediumChemistryA solution has a van’t Hoff factor i = 0.5. What type of particle behaviour does this most clearly indicate?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 18MediumChemistryIf both the mass of the solute and the mass of the solvent are doubled, what happens to the freezing-point depression, assuming the solute remains non-electrolytic and the solution remains dilute?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 18EasyChemistryWhat is the advantage of using a solvent with a larger Kf value in freezing-point-depression measurements?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 18EasyChemistryA solute gives molar masses of 120 g mol⁻¹ by boiling-point elevation and 60 g mol⁻¹ by osmotic pressure. If both experiments are reliable, what is the most probable explanation?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 18HardChemistryWhen a solute is very sparingly soluble in a solvent, what should be checked most carefully before determining its molar mass by a colligative-property method?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 18MediumChemistryIn the boiling-point-elevation method for determining the molar mass of an unknown solute, which quantity is measured directly?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 18EasyChemistryA solution has higher osmotic pressure than another solution at the same temperature. If both contain the same mass of solute, what is the most suitable conclusion about the first solute?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 18MediumChemistryDue to association, the apparent molar mass is 180 g mol⁻¹, while the true molar mass is 90 g mol⁻¹. What is the van’t Hoff factor?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 18MediumChemistryIf 0.5 g of a solute in 250 mL solution gives an osmotic pressure of 0.82 atm at 27 °C, find its molar mass. Use R = 0.082 L atm K⁻¹ mol⁻¹.Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 18MediumChemistryFor molar-mass determination of a non-electrolyte solute, which statement is correct?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 18EasyChemistryIf a solute completely dissociates into three ions in solution, how will its apparent molar mass compare with its true molar mass?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 18MediumChemistryIn the osmotic-pressure method, using M = wRT/(πV), what does V represent?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 18EasyChemistryEqual masses of two non-volatile solutes are dissolved in equal masses of the same solvent. If the first solution shows a greater freezing-point depression, what can be concluded about the first solute?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 18MediumChemistryIn the freezing-point depression method, in which situation will the calculated molar mass of a solute be higher than its true value?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 18MediumChemistryThe molar mass of a solute determined by osmotic pressure is lower than its normal value. What is the most suitable reason?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 18MediumChemistryThe molar mass of an unknown non-volatile solute is determined using boiling-point elevation. If the solvent mass is halved while the solute mass remains unchanged, what happens to the elevation?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 18Medium