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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।

ChemistryWhat problem occurs in molar-mass determination by relative lowering of vapour pressure if the solute is also volatile?Class 12Chapter 01: Solutions4: Vapour PressureLevel 18Hard ChemistryIf the solute sample contains an impurity during molar-mass determination, what is the usual effect?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 18Medium ChemistryWhat is the osmotic pressure of 0.01 mol of a non-electrolyte solute in 1 L of solution at 300 K? Take R = 0.082 L atm K⁻¹ mol⁻¹.Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 18Medium ChemistryA solution has a van’t Hoff factor i = 1.8. If the solute can dissociate into two ions, what is the nature of its dissociation?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 18Hard ChemistryIf the apparent molar mass of a solute approaches its true molar mass on dilution, what does this indicate?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 18Hard ChemistryFor two non-electrolyte solutions having the same molality, which solution will show the greater depression in freezing point?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 18Easy ChemistryIf 1 g of a solute dissolved in 100 g of a solvent produces a boiling-point elevation of 0.1 K, what boiling-point elevation will be produced when 2 g of the same solute is dissolved in 200 g of the same solvent? Assume the solutions behave ideally.Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 12Medium ChemistryIn molar-mass determination, colligative properties depend mainly on which factor?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 18Easy ChemistryIf the freezing-point depression is mistakenly measured as lower than its true value, what is the mathematical effect on the calculated molar mass?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 18Medium ChemistryIn an experiment, the mass of the solvent is accidentally recorded as higher than its actual value. How will the molar mass calculated from freezing-point depression be affected?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 18Medium ChemistryIf the molar mass calculated from boiling-point elevation is lower than the true molar mass, which correction is most appropriate when dissociation is responsible?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 18Hard ChemistryWhich colligative property is most suitable for determining the molar mass of a high-molar-mass polymer?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 18Medium ChemistryTo double the osmotic pressure of a solution while keeping temperature and volume constant, what change is required in the amount of solute?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 18Easy ChemistryA solution has a van’t Hoff factor i = 0.5. What type of particle behaviour does this most clearly indicate?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 18Medium ChemistryIf both the mass of the solute and the mass of the solvent are doubled, what happens to the freezing-point depression, assuming the solute remains non-electrolytic and the solution remains dilute?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 18Easy ChemistryWhat is the advantage of using a solvent with a larger Kf value in freezing-point-depression measurements?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 18Easy ChemistryA solute gives molar masses of 120 g mol⁻¹ by boiling-point elevation and 60 g mol⁻¹ by osmotic pressure. If both experiments are reliable, what is the most probable explanation?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 18Hard ChemistryWhen a solute is very sparingly soluble in a solvent, what should be checked most carefully before determining its molar mass by a colligative-property method?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 18Medium ChemistryIn the boiling-point-elevation method for determining the molar mass of an unknown solute, which quantity is measured directly?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 18Easy ChemistryWhich method often needs very precise measurement because the temperature change is very small?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 18Medium