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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।

ChemistryWhich assumption is necessary while determining molar mass by relative lowering of vapour pressure?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 18MediumChemistryIn the osmotic-pressure method, using M = wRT/(πV), what does V represent?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 18EasyChemistry1.5 g of a non-volatile solute dissolved in 50 g of benzene raises its boiling point by 0.78 K. If Kb for benzene is 2.6 K kg mol⁻¹, what is the molar mass of the solute?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 18MediumChemistryIf 2 g of a solute dissolved in 100 g of water lowers the freezing point by 0.186 K, and Kf for water is 1.86 K kg mol⁻¹, what is the molar mass of the solute?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 18MediumChemistryWhy is the osmotic-pressure method considered especially useful for determining the molar mass of biomolecules?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 18MediumChemistryEqual masses of two non-volatile solutes are dissolved in equal masses of the same solvent. If the first solution shows a greater freezing-point depression, what can be concluded about the first solute?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 18MediumChemistryIn the freezing-point depression method, in which situation will the calculated molar mass of a solute be higher than its true value?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 18MediumChemistryThe molar mass of a solute determined by osmotic pressure is lower than its normal value. What is the most suitable reason?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 18MediumChemistryThe molar mass of an unknown non-volatile solute is determined using boiling-point elevation. If the solvent mass is halved while the solute mass remains unchanged, what happens to the elevation?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 18MediumChemistryIn molar mass determination, if the observed van’t Hoff factor is i < 1, what is the most suitable conclusion?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 18MediumChemistryWhen 0.5 g of a solute is dissolved in 250 g of water, the freezing-point depression is 0.0186 K. If i = 1 and Kf for water is 1.86 K kg mol⁻¹, what is the molar mass?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 17HardChemistryIf a solute has i = 0.4 and a true molar mass of 80 g mol⁻¹, what will be the observed molar mass determined by a colligative method?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 17HardChemistryAn AB solute has a van’t Hoff factor i = 1.25 and an observed molar mass of 96 g mol⁻¹. What are its true molar mass and degree of dissociation?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 17HardChemistryIf 0.3 g of a solute in 150 mL of solution gives an osmotic pressure of 0.123 atm at 300 K, and i = 1, what is the molar mass?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 17HardChemistryA solute forms trimers to the extent of 60%. If its true molar mass is 180 g mol⁻¹, what will be its observed molar mass?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 17HardChemistryAn AB₂ solute has a true molar mass of 180 g mol⁻¹ and is 70% dissociated. What is its approximate observed molar mass?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 17HardChemistryA solute has a van’t Hoff factor i = 2.25 and an observed molar mass of 64 g mol⁻¹. What is its true molar mass?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 17HardChemistryWhen 4 g of a non-volatile solute is dissolved in 36 g of water, the relative lowering of vapour pressure is 0.08. What is the approximate molar mass of the solute?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 17HardChemistryWhen 4.5 g of a solute is dissolved in 300 g of water, the depression in freezing point is 0.837 K. If i = 1.5, what is the true molar mass?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 17HardChemistryIf K_b = 0.52 K kg mol⁻¹, the solute mass is 3 g, the solvent mass is 250 g, the molar mass of the solute is 60 g mol⁻¹, and the van’t Hoff factor i = 2, what is the elevation in boiling point, ΔT_b?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 17Medium

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