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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 the observed molar mass of a solute is greater than its normal molar mass, what is the most likely reason?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 15Hard ChemistryTwo solutions A and B have the same osmotic pressure at the same temperature. Solution A contains completely dissociated NaCl, while solution B contains a nonelectrolyte. In the same volume, which solution contains fewer actual moles of solute?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 15Hard ChemistryThe osmotic pressure of a polymer solution is very small. Which method is most suitable for determining its molar mass?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 15Medium ChemistryWhich colligative property is most suitable for determining the molar mass of high-molar-mass solutes such as proteins in dilute solutions?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 15Medium ChemistryIn an ideal solution, only the amount of solute is increased while the amount of solvent remains the same. Which statement is most correct?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 15Medium ChemistryIn which situation is the van’t Hoff factor of a solute expected to be less than 1?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 15Medium ChemistryIn a solution, solute particles normally remain completely unassociated. If half of the solute particles form dimers, how will the observed depression in freezing point compare with the ideal value at the same molality?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 15Hard ChemistryA student calculates the molar mass from the depression in freezing point by treating calcium chloride as non-dissociating. What is the main error compared with ideal dissociation?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 15Hard ChemistryA 0.1 M solute has a van’t Hoff factor i = 4. At the same temperature, how will its osmotic pressure compare with that of a 0.4 M non-dissociating solute?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 15Hard ChemistryWhich statement about the ebullioscopic constant \(K_b\) and cryoscopic constant \(K_f\) is correct?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 14Easy ChemistryDue to dissociation of an electrolyte, how is the observed molar mass generally obtained from a colligative property?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 14Medium ChemistryIf the mole fraction of a non-volatile solute in an ideal dilute solution is 0.03, what is the relative lowering of vapour pressure?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 14Easy ChemistryIf the boiling point of a solution is \(100.78^\circ C\) and that of pure water is \(100.00^\circ C\), what is the elevation in boiling point?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 14Easy ChemistryWhich of the following properties ideally depends only on the number of solute particles present in a solution and not on their chemical nature?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 14Easy ChemistryA solution contains 0.010 mol of solute in 1.00 L of solution. If its van’t Hoff factor is i = 2.0, what effective concentration should be used to calculate its osmotic pressure at 300 K?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 14Easy ChemistryA solution has a freezing-point depression, ΔT_f = 0.372 K. If the cryoscopic constant is K_f = 1.86 K kg mol⁻¹ and the molality is m = 0.100 mol kg⁻¹, what is the van’t Hoff factor (i)?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 14Medium ChemistryIn trimer formation, three molecules associate to form one particle. If association is complete, what is the van’t Hoff factor (i)?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 14Medium ChemistryAn electrolyte XY undergoes 30% dissociation. What will be its van’t Hoff factor (i)?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 14Medium ChemistryWhich statement is most accurate for colligative properties?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 14Easy ChemistryA solution has a relative lowering of vapour pressure of 0.25. If the total number of moles in the solution is 4, how many moles of solute are present?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 14Medium