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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 observed molar mass is greater than the normal molar mass, what is the simplest possible reason?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 17MediumChemistryIf the normal molar mass is 120 g mol⁻¹ and the observed molar mass is 60 g mol⁻¹, what is the van’t Hoff factor?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 17MediumChemistryWhich method is safest for determining the molar mass of large biomolecules because it does not require a large temperature change?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 17EasyChemistryIn the freezing-point depression method, 1.0 g of solute is dissolved in 100 g of solvent. If Kf = 2.0 K kg mol⁻¹ and ΔTf = 0.20 K, what is the molar mass of the solute?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 17MediumChemistryIn the boiling-point elevation method, if the temperature difference is measured smaller than its actual value, how will the calculated molar mass generally compare with the actual value?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 17MediumChemistryIf the pressure value in the osmotic-pressure method becomes double while all other quantities remain constant, what happens to the calculated molar mass?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 17MediumChemistryIn the osmotic-pressure method, if the mass of solute is increased while all other quantities remain constant, how will the calculated molar mass change?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 17EasyChemistryIf the mass of an unknown solute is 2.4 g and the osmotic pressure method gives the amount of solute as 0.012 mol, what is its molar mass?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 16MediumChemistryIf solute AB completely dissociates into A⁺ and B⁻, the observed molar mass from the colligative method will be what fraction of the true value?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 16MediumChemistryIn molar mass determination, if the solute is completely non-dissociated, what value of i is taken?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 16EasyChemistryWhen 2 g of a solute is dissolved in 250 g of solvent, the boiling-point elevation is 0.052 K. If Kb = 0.52 K kg mol⁻¹, what is the molar mass?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 16MediumChemistryWhen 1 g of a non-dissociated solute is dissolved in 100 g of water, the freezing-point depression is 0.093 K. If Kf = 1.86 K kg mol⁻¹, what is the molar mass?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 16MediumChemistryIf 2 g of a solute dissolved in 0.2 kg of solvent gives a molality of 0.1 m, what is the molar mass of the solute?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 16EasyChemistryWhat is the correct sequence for determining molar mass by the osmotic-pressure method?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 16MediumChemistryWhich sequence is most appropriate for determining molar mass from depression in freezing point?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 16MediumChemistryIf a solute undergoes association, how will the molar mass obtained by a colligative-property method compare with its true molar mass?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 16MediumChemistryIf a solute undergoes dissociation, how will the molar mass calculated without applying the van’t Hoff factor compare with the true molar mass?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 16MediumChemistryA 500 mL solution is prepared from 3.6 g of a non-dissociated solute. Its osmotic pressure at 300 K is 0.738 atm. What is the molar mass?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 16MediumChemistryIn the osmotic pressure method, 2 g of a solute is used to prepare 1 L of solution. At 300 K, the osmotic pressure is 0.492 atm. If R = 0.082 L atm mol⁻¹ K⁻¹, what is the molar mass?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 16MediumChemistryIf the observed molar mass is 1.25 times the true molar mass, what is the van’t Hoff factor (i)?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 16Medium