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Freezing Point Depression

Class 12 Chemistry के इस tag से जुड़े questions। हर question के साथ chapter, topic, level और difficulty दी गई है।

ChemistryAmong equal-molality solutions, which will have the lowest freezing point assuming complete dissociation?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 12Medium ChemistryAt the same molality, a solution has a freezing-point depression 0.6 times that of a normal solute. What is its observed molar mass relative to the true molar mass?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 12Easy ChemistryIf the freezing-point depression of an AB2 salt is 2.4 times that of a normal non-electrolyte, what is the percentage dissociation?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 13Medium ChemistryAn AB₃ electrolyte is 40% dissociated. Compared with a glucose solution of the same molality, how many times greater will its freezing-point depression be?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 9Medium ChemistryAt the same molality, NaCl solution shows a freezing-point depression about 1.8 times that of glucose. What is the correct conclusion about NaCl?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 10Medium ChemistryAmong solutions of equal molality, which gives the maximum depression in freezing point if dissociation is complete?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 5Easy ChemistryIf Kf and the measured masses are correct, but the freezing-point depression is greater than expected, what is the most likely cause of the abnormal molar mass?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 7Easy ChemistryA solute undergoes 70% tetramerisation. If the normal freezing-point depression is 0.80 K, what is the observed depression?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 14Hard ChemistryFor a 0.12 m solution, the normal freezing-point depression is 0.24 K and the observed depression is 0.60 K. What is i?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 9Easy ChemistryFor a 0.15 mol kg−1 solution, Kf = 2.0 K kg mol−1 and the observed freezing-point depression is 0.54 K. If the solute dissociates into two ions, what is the degree of dissociation?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 14Medium ChemistryA solute undergoes 80% tetramer association. If the normal freezing-point depression is 0.50 K, what is the observed depression?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 14Medium ChemistryFor a 0.10 m solution, the normal freezing-point depression is 0.186 K and the observed depression is 0.372 K. Which conclusion is correct?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 11Easy ChemistryFor a 0.20 mol kg⁻¹ solution, Kf = 1.5 K kg mol⁻¹ and the observed freezing-point depression is 0.45 K. If the solute dissociates into two ions, what is the degree of dissociation?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 13Medium ChemistryA freezing-point depression experiment gives i = 2.7 for an unknown solute. If it is of type AB₂, what is the approximate degree of dissociation?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 13Medium ChemistryA solute should normally show a freezing-point depression of 0.48 K, but the observed value is 0.24 K. If it forms only dimers, what is the degree of association?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 13Medium ChemistryFor a solution with K_f = 2.0 K kg mol⁻¹, molality 0.20 mol kg⁻¹, and observed ΔT_f = 0.60 K, what is i?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 13Medium ChemistryTwo solutions have the same molality. In the first, the solute completely dimerises; in the second, it completely dissociates into two ions. What is the ratio of their freezing-point depressions?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 13Hard ChemistryAn acid dimerises in benzene. The expected freezing-point depression is 0.50 K, but the observed value is 0.30 K. What is the approximate degree of association?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 17Hard ChemistryIf the measured depression in freezing point is 1.5 times the expected value, what is the van’t Hoff factor (i)?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 11Easy ChemistryWhich is the correct modified formula for depression in freezing point?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 12Medium