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

ChemistryA 500 mL solution is prepared using 0.75 g of an unknown solute. Its osmotic pressure at 300 K is 0.123 atm. If R = 0.082 L atm K⁻¹ mol⁻¹, what is the molar mass?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 18HardChemistryA 3.6 g sample of a substance dissolved in 250 g of solvent produces a boiling-point elevation of 0.156 K. If Kb = 0.52 K kg mol⁻¹, what is the molar mass of the substance?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 18HardChemistryWhen 2.4 g of a nonelectrolyte is dissolved in 300 g of water, the depression in freezing point is 0.1488 K. If Kf = 1.86 K kg mol⁻¹, what is the molar mass of the solute?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 18HardChemistryIf the osmotic-pressure method gives a molarity of 0.015 mol L⁻¹ and 400 mL of the solution contains 1.2 g of solute, what is the molar mass of the solute?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 16MediumChemistryAn unknown solute forms 750 mL of a 0.02 M solution and the solution contains 2.7 g of the solute. What is its molar mass?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 16MediumChemistryIf \(0.10\,\mathrm{mol}\) of solute has a mass of \(9.0\,\mathrm{g}\), and the same amount of solute is obtained from a colligative-property measurement, what is its molar mass?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 17EasyChemistryA solution has osmotic pressure \(1.23\,\mathrm{atm}\) at \(300\,\mathrm{K}\). If the concentration of the same solution is halved while the temperature remains \(300\,\mathrm{K}\), what will be the new osmotic pressure?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 17EasyChemistryA solute has a van’t Hoff factor i = 3 and an observed molar mass of 40 g mol⁻¹. What is its normal molar mass?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 17MediumChemistryA solution has a freezing-point depression 1.5 times the expected value for a non-dissociated solute. If the solute dissociates into two ions, what is the degree of dissociation?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 17MediumChemistryIf a 0.01 M non-dissociating solute has an osmotic pressure of 0.246 atm at 300 K, what will be the osmotic pressure of a 0.02 M solution of the same solute at the same temperature?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 17EasyChemistryWhich colligative property is most suitable for determining the molar mass of a polymer in a dilute solution?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 17MediumChemistryWhich of the following colligative properties is most suitable for determining the molar mass of a high-molar-mass solute such as a polymer?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 17EasyChemistryA solute has a normal molar mass of 100 g mol⁻¹ and an observed molar mass of 125 g mol⁻¹. What is the value of i?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 17EasyChemistryDuring molar-mass determination by the elevation-in-boiling-point method, for which solute is the observed molar mass likely to be greater than its true molar mass?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 17MediumChemistryA solution contains 0.25 g of solute in 250 mL of solution. At 300 K, its osmotic pressure is 0.246 atm. If R = 0.082 L atm K⁻¹ mol⁻¹, what is the molar mass of the solute?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 17MediumChemistryIf the molar mass of a solute obtained by the osmotic pressure method is unusually large, which experimental cause should be checked first?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 17Medium