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Molar Mass Determination

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

ChemistryWhich 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 18MediumChemistryThe molar mass of a substance is determined using both freezing-point depression and boiling-point elevation. If the solvent is not the same in both methods, what should be kept in mind?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 18MediumChemistryWhich method requires a semipermeable membrane to determine molar mass?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 18EasyChemistryWhich colligative property is generally considered most suitable for determining the molar mass of a high-molar-mass solute such as a protein?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 18MediumChemistryWhy is the osmotic-pressure method considered more suitable than other colligative-property methods for determining the molar mass of polymers?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 18MediumChemistryWhy is a very dilute solution considered suitable in the osmotic-pressure method for molar-mass determination?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 18MediumChemistryWhich colligative property is most suitable for determining the molar mass of a high-molar-mass solute such as a protein?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 the freezing point of a solution is 272.44 K and that of the pure solvent is 273.00 K, what is ΔT_f?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 18EasyChemistryIf the boiling point of a solution is 373.26 K and that of the pure solvent is 373.00 K, what is ΔT_b?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 18EasyChemistryUnder which condition is the observed molar mass of a solute greater than its true molar mass?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 18MediumChemistryIf 25% of the molecules of a substance form dimers, what will be its van’t Hoff factor i?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 18MediumChemistryIn molar-mass determination using colligative properties, for which type of solute is the observed molar mass generally lower than its true molar mass?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 18MediumChemistryFor determining the molar mass of a solute in dilute solutions, the osmotic-pressure method is especially suitable for which type of substances?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 18MediumChemistryIf vapour-pressure lowering calculation gives 0.2 mol of solute and the solute mass is 18 g, what is the molar mass?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 18MediumChemistryIn 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 18EasyChemistryIf 0.5 g of a polymer gives an osmotic pressure of 0.082 atm in 250 mL of solution at 300 K, what is its molar mass? Use R = 0.082 L atm K⁻¹ mol⁻¹.Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 18MediumChemistryA 0.02 mol sample of a substance has a mass of 3.6 g. What is the molar mass of the substance?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 18Easy

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