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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 an unknown solute is dissolved in 500 g of water, the freezing-point depression is 0.186 K. For water, K_f = 1.86 K kg mol⁻¹. What is the molar mass of the solute?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 17MediumChemistryWhy is osmotic pressure considered most suitable for determining the molar mass of heat-sensitive, high-molar-mass solutes such as proteins?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 18MediumChemistryWhich colligative property is most suitable for determining the molar mass of a high-molar-mass solute such as a protein in a dilute solution?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 18MediumChemistryA substance has a normal molar mass of 120 g mol⁻¹, but freezing-point depression gives an observed molar mass of 60 g mol⁻¹. If it dissociates into two ions, what is the degree of dissociation?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 18HardChemistryIn a boiling-point-elevation experiment, 3.0 g of a solute is dissolved in 75 g of solvent. If K_b = 0.75 K kg mol⁻¹ and ΔT_b = 0.30 K, what is the molar mass of the solute?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 17MediumChemistryIn the freezing-point-depression method, 1.5 g of a solute is dissolved in 50 g of solvent. If K_f = 2.0 K kg mol^{-1} and ΔT_f = 0.60 K, what is the molar mass of the solute?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 17MediumChemistryIn the osmotic-pressure method, 2.0 g of a solute is dissolved to make 250 mL of solution. At 300 K, the osmotic pressure is 0.984 atm. If R = 0.082 L atm K⁻¹ mol⁻¹, what is the molar mass of the solute?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 18HardChemistryWhich method requires a semipermeable membrane to determine molar mass?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 18EasyChemistryWhich colligative property is generally considered most suitable for determining the molar mass of a high-molar-mass solute such as a protein?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 18MediumChemistryIf the molar mass of a solute determined from colligative properties is greater than its true molar mass, which process is likely occurring in the solute?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 18MediumChemistryWhy is the osmotic-pressure method considered more suitable than other colligative-property methods for determining the molar mass of polymers?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 18MediumChemistryIn determining molar mass using colligative properties, what is the main effect of association of solute particles?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 18MediumChemistryIn which situation does association of solute molecules cause the observed molar mass to be greater than the actual molar mass?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 18MediumChemistryWhich colligative property is most suitable for determining the molar mass of a high-molar-mass solute such as a protein?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 18MediumChemistryIf a 0.30 m solution contains 3 g of solute dissolved in 100 g of solvent, what is the molar mass of the solute?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 18MediumChemistryIf the freezing point of a solution is 272.44 K and that of the pure solvent is 273.00 K, what is ΔT_f?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 18EasyChemistryIf the boiling point of a solution is 373.26 K and that of the pure solvent is 373.00 K, what is ΔT_b?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 18EasyChemistryUnder which condition is the observed molar mass of a solute greater than its true molar mass?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 18MediumChemistryIf 25% of the molecules of a substance form dimers, what will be its van’t Hoff factor i?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 18MediumChemistryIn molar-mass determination using colligative properties, for which type of solute is the observed molar mass generally lower than its true molar mass?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 18Medium