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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।

ChemistryWhen \(5\,\mathrm{g}\) of a non-dissociating solute is dissolved in \(250\,\mathrm{g}\) of solvent, the boiling point rises by \(0.104\,\mathrm{K}\). 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 ChemistryWhen \(2.4\,\mathrm{g}\) of a non-dissociating solute is dissolved in \(200\,\mathrm{g}\) of water, the freezing point decreases by \(0.372\,\mathrm{K}\). If \(K_f=1.86\,\mathrm{K\,kg\,mol^{-1}}\), what is the molar mass of the solute?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 16Medium ChemistryA \(0.001\,\mathrm{M}\) solution is prepared to determine the molar mass of a protein. Which measurement is most useful for such a very dilute solution?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 16Medium ChemistryIf \(0.10\,\mathrm{mol}\) 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 17Easy ChemistryIf \(2.0\,\mathrm{g}\) of solute in \(1.0\,\mathrm{L}\) of solution gives an osmotic pressure of \(0.492\,\mathrm{atm}\) at \(300\,\mathrm{K}\), what is the molar mass? Use \(R=0.082\,\mathrm{L\,atm\,K^{-1}\,mol^{-1}}\).Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 17Medium ChemistryWhen \(4.0\,\mathrm{g}\) of a solute is dissolved in \(400\,\mathrm{g}\) of solvent, \(\Delta T_f=0.50\,\mathrm{K}\). If \(K_f=5.0\,\mathrm{K\,kg\,mol^{-1}}\), what is the molar mass of the solute?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 17Medium ChemistryIf a solution has van’t Hoff factor \(i=0.8\) and normal molar mass \(200\,\mathrm{g\,mol^{-1}}\), what will be the observed molar mass?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 17Medium ChemistryIf a solute forms trimers to the extent of 50% during molar-mass determination, what will be the value of the van’t Hoff factor i?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 17Hard ChemistryWhich colligative property is most suitable for determining the molar mass of macromolecules such as proteins, which have very high molar masses?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 17Medium ChemistryA solution contains 1.8 g of solute dissolved in 90 g of solvent. If Kf = 1.5 K kg mol⁻¹ and ΔTf = 0.30 K, what is the molar mass of the solute?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 17Medium ChemistryIf association of a solute makes the observed elevation in boiling point equal to 0.75 of the expected value and the solute forms dimers, what is the degree of association?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 17Medium ChemistryA 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 17Medium ChemistryIf 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 17Easy ChemistryWhich method remains comparatively easier to measure even at very low concentration while determining molar mass?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 17Medium ChemistryWhich colligative property is most suitable for determining the molar mass of a polymer in a dilute solution?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 17Medium ChemistryEqual 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 17Hard ChemistryWhen 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 17Medium ChemistryIf 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 17Medium ChemistryWhich 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 17Easy ChemistryA 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 17Easy