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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 actual molar mass of a solute is 180 g mol⁻¹ but the experimental value is 90 g mol⁻¹, which process is possible?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 17Medium ChemistryIn molar-mass determination, if a solute dissociates into ions, which correction is required in the formula?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 17Medium ChemistryIf the osmotic pressure of one solution is greater than that of another at the same temperature, and both solutes are non-dissociating, what can be concluded about the first solution?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 17Medium ChemistryIn the freezing-point-depression method, \(K_f=1.86\,\mathrm{K\,kg\,mol^{-1}}\), \(\Delta T_f=0.93\,\mathrm{K}\), and the solute is non-dissociating. What is the molality?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 17Easy ChemistryUnder which condition is the molar mass obtained from a colligative-property measurement most reliable?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 17Medium ChemistryWhat happens if \(w_A\) and \(w_B\) are interchanged in a molar-mass determination formula?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 17Medium ChemistryThe normal molar mass of a solute is \(90\,\mathrm{g\,mol^{-1}}\). If the van’t Hoff factor is \(i=3\), what will be the observed molar mass?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 17Medium ChemistryIf a 0.2 mol kg⁻¹ non-dissociating solution has K_f = 1.86 K kg mol⁻¹, what is the freezing-point depression?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 17Easy ChemistryIf the observed molar mass of a substance is double its normal value, what is the van’t Hoff factor?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 17Easy ChemistryIf the observed molar mass of a substance is half of its normal value, what is the van’t Hoff factor?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 17Easy ChemistryIf the mass of a non-dissociating solute remains the same but the mass of the solvent is doubled, what happens to the freezing-point depression?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 17Medium ChemistryWhy can an error occur in molar mass determination if the solution is too concentrated?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 17Medium ChemistryIf the osmotic pressure of a 0.1 M solution is to be found at 300 K and the solute is non-dissociating, which formula is simplest?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 17Easy ChemistryIf a solute associates to form dimers, why does the molar mass obtained from colligative properties generally increase?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 17Medium ChemistryIf the van’t Hoff factor is 2 and the normal molar mass is 100 g mol⁻¹, what is the observed molar mass?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 17Easy ChemistryFor a non-dissociating solute, Kb = 0.52 K kg mol⁻¹ and the molality is 0.5 mol kg⁻¹. What is the elevation in boiling point?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 17Easy ChemistryIn the osmotic-pressure method, 0.01 mol of a non-electrolyte solute is present in 1 L of solution. At 300 K, if R = 0.082 L atm K⁻¹ mol⁻¹, what is the osmotic pressure?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 17Easy ChemistryWhich of the following colligative properties can be used to determine the molar mass of a solute?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 17Easy ChemistryThe depression in freezing point of a solution is 0.186 K. If K_f = 1.86 K kg mol⁻¹ and the molality of the solution is 0.1 mol kg⁻¹, what is the van’t Hoff factor?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 17Easy ChemistryIn the boiling-point elevation method, 2 g of a non-electrolyte solute is dissolved in 100 g of solvent. If K_b = 0.5 K kg mol⁻¹ and the elevation in boiling point, ΔT_b, is 0.25 K, what is the molar mass of the solute?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 17Medium