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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।

ChemistryIf vapour-pressure lowering calculation gives 0.2 mol of solute and the solute mass is 18 g, what is the molar mass?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 18Medium ChemistryIf a 0.2 m nonelectrolyte solution has Kf = 1.86 K kg mol⁻¹, what is the depression in freezing point?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 18Easy ChemistryIn the freezing-point-depression method, if the solute mass is doubled while the solvent mass remains constant, what happens to ΔT_f for a nonelectrolyte?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 18Easy ChemistryIf 0.5 g of a polymer gives an osmotic pressure of 0.082 atm in 250 mL of solution at 300 K, what is its molar mass? Use R = 0.082 L atm K⁻¹ mol⁻¹.Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 18Medium ChemistryThe observed molar mass of a solute in a solution is higher than its normal molar mass. What is the simplest possible reason?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 18Medium ChemistryThe observed molar mass of a solute in a solution is lower than its normal molar mass. Which statement best explains this observation?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 18Medium ChemistryIf 0.9 g of a substance produces an osmotic pressure of 0.246 atm in 0.3 L of solution at 300 K, what is its molar mass? Take R = 0.082 L atm K⁻¹ mol⁻¹.Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 18Medium ChemistryWhen 2.4 g of a substance is dissolved in 200 g of solvent, the boiling point rises by 0.104 K. If Kb = 0.52 K kg mol⁻¹, what is the molar mass of the substance?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 18Medium ChemistryWhen 4.5 g of a nonelectrolyte is dissolved in 250 g of water, the freezing-point depression is 0.372 K. If Kf = 1.86 K kg mol⁻¹, what is the molar mass of the solute?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 18Medium ChemistryA solution has an osmotic pressure of 2.46 atm at 300 K and a concentration of 0.1 M. Taking R = 0.082 L atm K⁻¹ mol⁻¹, what is the van’t Hoff factor?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 18Medium ChemistryIn the osmotic-pressure method, if the volume of a solution is halved while the amount of solute and temperature remain unchanged, what happens to the osmotic pressure?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 18Medium ChemistryWhen 1 g of a substance is dissolved in 100 g of a solvent, the elevation in boiling point is 0.052 K. If Kb = 0.52 K kg mol⁻¹, what is the molar mass of the substance?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 18Medium ChemistryIf a salt gives three ions on complete dissociation, how will the observed molar mass obtained from colligative properties compare with its normal molar mass?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 18Medium ChemistryThe normal molar mass of a solute is 60 g mol⁻¹, but its observed molar mass from colligative properties is 30 g mol⁻¹. What is the van’t Hoff factor?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 18Medium ChemistryWhy can a small error in the temperature difference cause a large error in molar mass determination?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 18Medium ChemistryThe molar mass obtained from freezing-point depression is lower than expected. If the solute is an electrolyte, which reason is suitable?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 17Medium ChemistryIf two non-dissociating solutes have equal masses and the first has a lower molar mass, which one will show the greater colligative effect?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 17Medium ChemistryIf a solute is completely non-dissociating but a student uses i = 2, what will happen to the molar mass calculation?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 17Medium ChemistryWhat common principle is used in molar mass determination by both boiling-point elevation and freezing-point depression?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 17Medium ChemistryIf the actual molar mass of a solute is 60 g mol⁻¹ but the experimental value is 120 g mol⁻¹, which conclusion is suitable?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 17Medium