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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।

ChemistryIf the osmotic pressure of a solution is 25% less than the expected ideal value, how will the observed molar mass compare with the true molar mass?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 20Medium ChemistryThe observed molar mass of an acid in benzene is 180 g mol⁻¹, whereas its true molar mass is 120 g mol⁻¹. If only dimerisation occurs, what is the degree of dimerisation?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 20Hard ChemistryIn a solution, solute A undergoes 30% tetramerisation, meaning that four molecules combine to form one particle. What is the value of i?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 20Hard ChemistryThe true molar mass of a solute is 100 g mol⁻¹ and its van’t Hoff factor is 1.25. What is the observed molar mass?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 19Medium ChemistryA substance has a van’t Hoff factor, i = 0.6, and undergoes only dimerisation. What is the degree of dimerisation?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 19Hard ChemistryIf i = 2.8 and the solute can give three ions on complete dissociation, what is the approximate degree of dissociation?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 19Hard ChemistryWhich statement correctly explains the abnormal molar mass of carboxylic acids in benzene?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 19Hard ChemistryWhich substance is more likely to show abnormal molar mass in water because of dissociation?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 19Medium ChemistryUnder identical conditions, a solute has an osmotic pressure equal to 0.75 times the expected value. How is its observed molar mass related to the true molar mass?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 19Hard ChemistryAn AB₄ salt is 20% dissociated. What is the value of the van’t Hoff factor i?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 19Hard ChemistryIf the van’t Hoff factor i for an electrolyte is less than its ideal maximum, what is the best possible reason?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 19Medium ChemistryA solute undergoes 60% trimerisation, meaning that three molecules combine to form one particle. What is the value of the van’t Hoff factor i?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 19Hard ChemistryIn a 0.40 mol kg⁻¹ solution, Kb = 0.50 K kg mol⁻¹ and the observed boiling-point elevation is 0.30 K. If the solute dissociates into two ions, what is the degree of dissociation?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 13Medium ChemistryAn unknown solute has i = 5. Which cause is most suitable?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 9Easy ChemistryFor an AB electrolyte, 100 initial units produce 130 effective particles. What is the degree of dissociation?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 12Medium ChemistryThe apparent molar mass of a solute is 96 g mol−1. If i = 1.25, what is the true molar mass?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 10Easy ChemistryThe normal boiling-point elevation for a solute is 0.32 K. What is the observed elevation if 50% trimer association occurs?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 12Medium ChemistryTen percent of a solute forms dimers, 30% forms trimers, and 20% forms tetramers; the rest remains single. What is i?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 17Hard ChemistryA solution has i = 0.48. Which statement is most correct?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 9Easy 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