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Class 12 · Chemistry
→If the apparent molar mass of a solute approaches its true molar mass on dilution, what does this indicate?
Class 12 · Chemistry
→For two non-electrolyte solutions having the same molality, which solution will show the greater depression in freezing point?
Class 12 · Chemistry
→If 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 12 · Chemistry
→In molar-mass determination, colligative properties depend mainly on which factor?
Class 12 · Chemistry
→If the freezing-point depression is mistakenly measured as lower than its true value, what is the mathematical effect on the calculated molar mass?
Class 12 · Chemistry
→In 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 12 · Chemistry
→If 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 12 · Chemistry
→Which colligative property is most suitable for determining the molar mass of a high-molar-mass polymer?
Class 12 · Chemistry
→To double the osmotic pressure of a solution while keeping temperature and volume constant, what change is required in the amount of solute?
Class 11 · Chemistry
→If 10 g of a solute dissolved in 500 g of solvent produces a molality of 0.2 mol kg⁻¹, what is the molar mass of the solute?
Class 12 · Chemistry
→A solution has a van’t Hoff factor i = 0.5. What type of particle behaviour does this most clearly indicate?
Class 12 · Chemistry
→If 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 12 · Chemistry
→What is the advantage of using a solvent with a larger Kf value in freezing-point-depression measurements?
Class 12 · Chemistry
→A 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 12 · Chemistry
→When 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 12 · Chemistry
→In the boiling-point-elevation method for determining the molar mass of an unknown solute, which quantity is measured directly?
Class 12 · Chemistry
→A solution has higher osmotic pressure than another solution at the same temperature. If both contain the same mass of solute, what is the most suitable conclusion about the first solute?
Class 12 · Chemistry
→Due to association, the apparent molar mass is 180 g mol⁻¹, while the true molar mass is 90 g mol⁻¹. What is the van’t Hoff factor?
Class 12 · Chemistry
→Which is the correct relation for molar-mass determination using relative lowering of vapour pressure?
Class 12 · Chemistry
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