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7 Abnormal Molecular Mass

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

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 ChemistryA solute has i = 0.40 and forms only trimers. What is the approximate degree of association?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 14Hard ChemistryA solute forms trimers and 60% of its molecules become associated. What is the van’t Hoff factor?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 13Medium ChemistryIf the osmotic pressure of a solution is 1.8 times the normally expected value, what is its van’t Hoff factor?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 9Easy 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 ChemistryA weak electrolyte XY has i = 1.25 and gives two ions. What is its degree of dissociation?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 11Medium ChemistryA solute has i = 0.75. If it only forms dimers, what is the degree of association?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 12Medium ChemistryAB₃ undergoes 40% dissociation into A³⁺ and three B⁻ ions. What fraction of the true molar mass is the apparent molar mass?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 14Hard ChemistryThe apparent molar mass of a solute is double its true molar mass. What is the most suitable explanation?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 12Medium ChemistryA salt MX₂ is 75% dissociated. Since it gives three ions on complete dissociation, what is its van’t Hoff factor?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 11Medium 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 ChemistryA solute has true molar mass 120 g mol⁻¹ and apparent molar mass 80 g mol⁻¹. What is its van’t Hoff factor?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 11Medium ChemistryAn electrolyte AB is 60% dissociated into A⁺ and B⁻. What is its van’t Hoff factor?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 11Medium ChemistryA solute completely dimerises in solution. If its true molar mass is M, what apparent molar mass is obtained from freezing-point depression?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 12Medium ChemistryA solute has normal molar mass 56 and observed molar mass 28. What is the most suitable explanation?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 10Medium ChemistryA solute has normal molar mass 80 and observed molar mass 160. Which process is possible?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 10Medium ChemistryA substance has normal molar mass 150 and van’t Hoff factor 1.5. What is its observed molar mass?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 10Medium ChemistryWhat is the ideal van’t Hoff factor for NH₄Cl on complete dissociation?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 7Easy ChemistryWhat is the van’t Hoff factor for SrCl₂ on complete dissociation?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 7Easy ChemistryIn a question on abnormal molar mass, what should usually be decided first?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 8Easy