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Molality

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

ChemistryWhen \(3.2\,\mathrm{g}\) of a solute is dissolved in \(400\,\mathrm{g}\) of water, the depression in freezing point is \(0.186\,\mathrm{K}\). Taking \(K_f=1.86\,\mathrm{K\,kg\,mol^{-1}}\), what is the molar mass of the solute?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 16MediumChemistryWhen \(4.0\,\mathrm{g}\) of a solute is dissolved in \(400\,\mathrm{g}\) of solvent, \(\Delta T_f=0.50\,\mathrm{K}\). If \(K_f=5.0\,\mathrm{K\,kg\,mol^{-1}}\), what is the molar mass of the solute?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 17MediumChemistryA solution contains 1.8 g of solute dissolved in 90 g of solvent. If Kf = 1.5 K kg mol⁻¹ and ΔTf = 0.30 K, what is the molar mass of the solute?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 17MediumChemistryEqual masses of two non-dissociating solutes are dissolved separately in equal masses of the same solvent. If both solutions show the same depression in freezing point (ΔTf), what can be concluded about their molar masses?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 17HardChemistryWhen 2.0 g of solute is dissolved in 50 g of solvent, ΔTb = 0.40 K. If Kb = 0.80 K kg mol⁻¹, what is the molar mass of the solute?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 17MediumChemistryIf 1.0 g of solute is present in 100 g of solvent, Kf = 1.86 K kg mol⁻¹, and the molar mass is 100 g mol⁻¹, what is the ideal ΔTf?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 17MediumChemistryA solution contains 2 g of solute in 200 g of solvent. If Kf = 4.0 K kg mol⁻¹ and ΔTf = 0.50 K, what is the molar mass of the solute?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 17MediumChemistryWhen \(2\,\mathrm{g}\) of a non-dissociating solute is dissolved in \(100\,\mathrm{g}\) of solvent, \(\Delta T_b=0.52\,\mathrm{K}\). If \(K_b=0.52\,\mathrm{K\,kg\,mol^{-1}}\), what is the molar mass?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 17MediumChemistryWhen 5 g of an unknown solute is dissolved in 500 g of water, the freezing-point depression is 0.186 K. For water, K_f = 1.86 K kg mol⁻¹. What is the molar mass of the solute?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 17MediumChemistryIn a boiling-point-elevation experiment, 3.0 g of a solute is dissolved in 75 g of solvent. If K_b = 0.75 K kg mol⁻¹ and ΔT_b = 0.30 K, what is the molar mass of the solute?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 17MediumChemistryIn the freezing-point-depression method, 1.5 g of a solute is dissolved in 50 g of solvent. If K_f = 2.0 K kg mol^{-1} and ΔT_f = 0.60 K, what is the molar mass of the solute?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 17MediumChemistryWhich mistake can greatly change the answer in a molar-mass determination problem involving molality?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 18MediumChemistryA solution contains 2.5 g of solute dissolved in 500 g of solvent. If the molar mass of the solute is 50 g mol⁻¹, what is the molality of the solution?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 18MediumChemistryIf a 0.30 m solution contains 3 g of solute dissolved in 100 g of solvent, what is the molar mass of the solute?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 18MediumChemistryFor a nonelectrolyte, K_f = 1.86 K kg mol⁻¹ and ΔT_f = 0.56 K. What is the approximate molality?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 18EasyChemistryIf a 0.2 m nonelectrolyte solution has Kf = 1.86 K kg mol⁻¹, what is the depression in freezing point?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 18EasyChemistryA solution contains 2 g of solute in 100 g of solvent. If the molar mass of the solute is 100 g mol⁻¹, what is the molality?Class 12Chapter 01: Solutions2: Concentration MetricsLevel 18EasyChemistryIn the freezing-point-depression method, if the solute mass is doubled while the solvent mass remains constant, what happens to ΔT_f for a nonelectrolyte?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 18EasyChemistryA solution contains 1.8 g of solute dissolved in 200 g of water. If its molality is 0.05 m, what is the molar mass of the solute?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 18MediumChemistryWhat common principle is used in molar mass determination by both boiling-point elevation and freezing-point depression?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 17Medium