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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।

ChemistryIf the boiling-point elevation is 0.104 K and Kb is 0.52 K kg mol⁻¹, what is the molality of a non-dissociated solution?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 16Easy ChemistryIf a 0.5 m solution is prepared using 0.2 kg of solvent, how many moles of solute are present?Class 12Chapter 01: Solutions2: Concentration MetricsLevel 16Easy ChemistryIf a 0.1 m solution is prepared using 0.100 kg of solvent, how many moles of solute are present?Class 12Chapter 01: Solutions2: Concentration MetricsLevel 16Easy ChemistryIf a 0.2 m solution is prepared using 0.5 kg of solvent, how many moles of solute are present?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 16Easy ChemistryIn the freezing-point depression method, if the mass of solvent is 100 g, what is its mass in kilograms?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 16Easy ChemistryIn molar-mass determination by boiling-point elevation, which quantity is usually calculated first?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 16Medium ChemistryIf ΔTᶠ = 0.372 K and Kᶠ = 1.86 K kg mol⁻¹, what is the molality of a non-dissociated solution?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 16Easy ChemistryIn molar mass determination using freezing-point depression, in which unit must the mass of the solvent be expressed?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 16Easy ChemistryFor a solution, i = 2.5 and molality is 0.2 m. If Kf = 1.86 K kg mol⁻¹, what is ΔTf?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 15Medium ChemistryA solution contains 5 g of solute in 100 g of solvent. If the same amount of solute is dissolved in 200 g of solvent, what happens to the depression in freezing point?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 15Medium ChemistrySolutions A and B contain the same amount of solute. Solution A contains 500 g of solvent, whereas solution B contains 1000 g of solvent. Which solution has the greater depression in freezing point?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 15Medium ChemistryA solution contains 18 g of glucose in 1 kg of water. The molar mass of glucose is 180 g mol⁻¹ and Kf = 1.86 K kg mol⁻¹. What is the depression in freezing point?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 16Medium ChemistryIf 1 mole of solute is dissolved in 500 g of solvent and the van’t Hoff factor is 2, what is the effective molality?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 14Medium ChemistryFor the same solvent at the same temperature, which observation confirms that depression in freezing point is a colligative property?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 14Medium ChemistryA solution has a boiling-point elevation of 0.52 K, and Kb = 0.52 K kg mol⁻¹. If the solute is non-dissociating, what is the molality?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 14Medium ChemistryWhich option correctly matches a colligative property with the concentration term conventionally used in its formula?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 13Medium ChemistryFor a solution, ΔTb = 0.208 K, Kb = 0.52 K kg mol⁻¹, and i = 2. What is the molality of the solution?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 14Medium ChemistryDissolving 4 g of a non-dissociated solute in 200 g of water produces a freezing-point depression of 0.465 K. If Kf = 1.86 K kg mol−1, what is the molar mass of the solute?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 14Hard ChemistryWhen the molality of a solute is increased in a solution, with all other conditions unchanged, what happens to the elevation in boiling point?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 14Easy ChemistryIf the freezing point of a solution is 1.86 K lower than that of the pure solvent and Kf = 1.86 K kg mol−1, what is the molality of the non-dissociated solute?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 14Medium