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Abnormal Molar Mass

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

ChemistryIf the normal molar mass of a substance is 170 g mol⁻¹ and i = 0.85 because of 20% tetramer association, what is the observed molar mass?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 18MediumChemistryIf 20% of a substance forms tetramers, what is the van’t Hoff factor?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 18HardChemistryIf the observed molar mass in a solution is 1.25 times the normal molar mass, what is the van’t Hoff factor i?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 18MediumChemistryThe observed molar mass of a substance is 50 g mol⁻¹ and its van’t Hoff factor is 2.4. What is its normal molar mass?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 18MediumChemistryIf the observed molar mass of an AB₃ salt is half of its normal molar mass, what is the degree of dissociation?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 18HardChemistryA solution contains 2.0 g solute in 100 g solvent. If the observed molar mass is 80 g mol⁻¹ and the normal molar mass is 120 g mol⁻¹, what is the ratio of normal molality to effective molality?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 18HardChemistryWhen 0.8 g of a substance is dissolved in 200 g of water, the depression in freezing point is 0.186 K. If the actual molar mass is 40 g mol⁻¹ and Kf = 1.86 K kg mol⁻¹, what is the behaviour of the solute?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 18HardChemistryA 0.5 g solute dissolved in 100 g water gives ΔT_f = 0.093 K. If K_f = 1.86 K kg mol⁻¹ and the solute undergoes 50% dimer association, what is its normal molar mass?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 18HardChemistryIf 60% of the molecules of a substance form trimers and its normal molar mass is 90 g mol−1, what will be the observed molar mass?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 18HardChemistryWhen 4.0 g of a substance is dissolved in 200 g of water, ΔTf = 0.372 K. If its normal molar mass is 100 g mol−1 and Kf = 1.86 K kg mol−1, what is the van’t Hoff factor i in the solution?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 18HardChemistryThe normal molar mass of an organic acid is 60 g mol⁻¹. In benzene, its observed molar mass is 96 g mol⁻¹. If association occurs only through dimerisation, what is the degree of association?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 18HardChemistryIn a solution, the observed molar mass of a solute is 72 g mol⁻¹ and its normal molar mass is 120 g mol⁻¹. For an AB-type solute, what is the degree of dissociation?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 18HardChemistryA salt of the type AB₂ is 75% dissociated. If its normal molar mass is 120 g mol⁻¹, what will be its observed molar mass?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 18HardChemistryA substance undergoes 40% dimer association. If its normal molar mass is 100 g mol⁻¹, what will be the approximate observed molar mass?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 18HardChemistryThe normal molar mass of a solute is 90 g mol⁻¹. If its observed molar mass obtained from a colligative-property measurement is 60 g mol⁻¹, what is the van’t Hoff factor?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 18MediumChemistryA solute has a van’t Hoff factor of \(i=1.25\) and an observed molar mass of \(80\,g\,mol^{-1}\). What is its true molar mass?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 16MediumChemistryThe observed molar mass of an AB₃ solute is 4/7 of its true molar mass. What is the degree of dissociation of the solute?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 16HardChemistryIn a solution, the true molar mass of the solute is 100 g mol⁻¹, but the vapour-pressure method gives an observed molar mass of 50 g mol⁻¹. Which conclusion is correct?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 16MediumChemistryIf the observed molar mass of a solute is 1.6 times its true molar mass, what is the van’t Hoff factor, i?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 16MediumChemistryIf the observed molar mass of a solute is 0.8 times its true molar mass, what is the van’t Hoff factor, i?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 16Medium