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Chapter 01 Solutions

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

ChemistryIn the freezing-point depression method, what problem occurs if the total mass of the solution is mistakenly used as the mass of the solvent?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 17Medium ChemistryFor a non-dissociating solute, Kb = 0.52 K kg mol⁻¹ and the molality is 0.5 mol kg⁻¹. What is the elevation in boiling point?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 17Easy ChemistryIf 1 g of solute is dissolved in 200 g of solvent and its molar mass is 50 g mol⁻¹, what is the molality of the solution?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 17Easy ChemistryIn the osmotic-pressure method, 0.01 mol of a non-electrolyte solute is present in 1 L of solution. At 300 K, if R = 0.082 L atm K⁻¹ mol⁻¹, what is the osmotic pressure?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 17Easy ChemistryWhich of the following colligative properties can be used to determine the molar mass of a solute?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 17Easy ChemistryWhile determining molar mass from lowering of vapour pressure, the mole fraction of the solute is related to which quantity?Class 12Chapter 01: Solutions4: Vapour PressureLevel 17Easy ChemistryThe depression in freezing point of a solution is 0.186 K. If K_f = 1.86 K kg mol⁻¹ and the molality of the solution is 0.1 mol kg⁻¹, what is the van’t Hoff factor?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 17Easy ChemistryIf an electrolyte gives an observed molar mass lower than its normal molar mass during molar-mass determination, what is the reason?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 17Medium ChemistryIn the boiling-point elevation method, 2 g of a non-electrolyte solute is dissolved in 100 g of solvent. If K_b = 0.5 K kg mol⁻¹ and the elevation in boiling point, ΔT_b, is 0.25 K, what is the molar mass of the solute?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 17Medium 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 17Medium ChemistryIf 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 17Medium ChemistryWhich 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 17Easy ChemistryIn 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 17Medium ChemistryIn 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 17Medium ChemistryA solution contains 2 g of solute in 1 L at 300 K and has an osmotic pressure of 0.6 atm. If R = 0.082 L atm K⁻¹ mol⁻¹, what is the approximate molar mass of the solute?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 17Medium ChemistryIf 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 17Medium ChemistryIn 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 17Easy ChemistryWhich mistake can make the result most incorrect in molar-mass determination by a colligative-property method?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 16Medium ChemistryIf 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 16Medium ChemistryIf 1.5 g solute forms a 0.05 m solution in 300 g solvent, what is the molar mass of the solute?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 16Medium