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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।

ChemistryHow is the van’t Hoff factor included in the formula for elevation in boiling point?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 11MediumChemistryIf 1 g of a solute dissolved in 100 g of a solvent produces a boiling-point elevation of 0.1 K, what boiling-point elevation will be produced when 2 g of the same solute is dissolved in 200 g of the same solvent? Assume the solutions behave ideally.Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 12MediumChemistryIf both the mass of the solute and the mass of the solvent are doubled, what happens to the freezing-point depression, assuming the solute remains non-electrolytic and the solution remains dilute?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 18EasyChemistryEqual masses of two non-volatile solutes are dissolved in equal masses of the same solvent. If the first solution shows a greater freezing-point depression, what can be concluded about the first solute?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 18MediumChemistryThe molar mass of an unknown non-volatile solute is determined using boiling-point elevation. If the solvent mass is halved while the solute mass remains unchanged, what happens to the elevation?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 18MediumChemistryWhen 0.5 g of a solute is dissolved in 250 g of water, the freezing-point depression is 0.0186 K. If i = 1 and Kf for water is 1.86 K kg mol⁻¹, what is the molar mass?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 17HardChemistryIf K_b = 0.52 K kg mol⁻¹, the solute mass is 3 g, the solvent mass is 250 g, the molar mass of the solute is 60 g mol⁻¹, and the van’t Hoff factor i = 2, what is the elevation in boiling point, ΔT_b?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 17MediumChemistryIf K_f = 1.86 K kg mol⁻¹, the solute mass is 4 g, the solvent mass is 200 g, the molar mass of the solute is 100 g mol⁻¹, and the van’t Hoff factor i = 1.5, what is the depression in freezing point, ΔT_f?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 17MediumChemistryFor a non-dissociated solute, K_b = 0.52 K kg mol⁻¹, the solute mass is 1.2 g, the solvent mass is 100 g, and the molar mass is 60 g mol⁻¹. What is the elevation in boiling point, ΔT_b?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 16EasyChemistryFor a non-dissociated solute, K_f = 1.86 K kg mol⁻¹, the solute mass is 2.5 g, the solvent mass is 250 g, and the molar mass is 100 g mol⁻¹. What is the depression in freezing point, ΔT_f?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 16EasyChemistryIn molar mass determination, a student treats 100 g solvent as 100 kg while calculating molality. What will happen to the result?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 18MediumChemistryA 0.04 m solution is formed by dissolving 2.0 g of a nonelectrolyte in 0.5 kg solvent. If 4.0 g of the same solute is dissolved in 0.25 kg of the same solvent, what will be the new molality?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 18MediumChemistryA 0.05 mol kg⁻¹ solution is prepared by dissolving 3.0 g of a nonelectrolyte in 500 g of solvent. What is the molar mass of the solute?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 18MediumChemistryA solution contains 1.5 g solute dissolved in 0.25 kg solvent. If its molality is 0.06 m, what is the molar mass of the solute?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 18MediumChemistryWhen \(10\,g\) of an unknown solute is dissolved in \(1\,kg\) of solvent, the freezing-point depression is \(\Delta T_f=0.093\,K\). If \(K_f=1.86\,K\,kg\,mol^{-1}\), what is the molar mass of the solute? Assume no association or dissociation.Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 16MediumChemistryIf a 0.05 m solution is prepared by dissolving 2.4 g of solute in 400 g of solvent, what is the molar mass of the solute?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 16MediumChemistryIf a 0.2 m solution contains 0.04 mol of solute and the mass of the solute is 4.8 g, what is its molar mass?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 16EasyChemistryIf the elevation in boiling point is 0.312 K, K_b = 0.52 K kg mol⁻¹, the solvent mass is 100 g, and the solute mass is 3 g, what is the molar mass of the non-dissociated solute?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 16MediumChemistryFor a non-dissociated solute, K_f = 1.86 K kg mol⁻¹ and ΔT_f = 0.558 K. If 6 g of solute is dissolved in 250 g of solvent, what is its molar mass?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 16MediumChemistryWhen \(2\,\mathrm{g}\) of a non-dissociating solute is dissolved in \(100\,\mathrm{g}\) of solvent, the boiling-point elevation is \(0.208\,\mathrm{K}\). If \(K_b=0.52\,\mathrm{K\,kg\,mol^{-1}}\), what is the molar mass of the solute?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 16Medium