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Class 12 · Chemistry
→Two molecules associate to form one dimer. If the degree of association is 80%, what is the van’t Hoff factor?
Class 12 · Chemistry
→The normal molar mass of a solute is 120 g mol⁻¹, while its observed molar mass from the osmotic-pressure method is 60 g mol⁻¹. What is the van’t Hoff factor?
Class 12 · Chemistry
→If glucose, sodium chloride, and aluminium chloride are dissolved in three solutions of equal molality, what is the correct order of freezing-point depression under ideal conditions?
Class 12 · Chemistry
→In an ideal dilute solution containing a non-volatile solute, which relation represents the relative lowering of vapour pressure?
Class 12 · Chemistry
→Why does solvent flow opposite to the normal direction during reverse osmosis?
Class 12 · Chemistry
→A 0.2 m solution has a freezing-point depression of 0.186 K. If Kf = 1.86 K kg mol⁻¹, what is the van’t Hoff factor and what does it indicate?
Class 12 · Chemistry
→In which condition is a red blood cell most likely to shrink?
Class 12 · Chemistry
→Which of the following colligative properties is not directly applicable to a solution containing a volatile solute?
Class 12 · Chemistry
→If a 0.1 m NaCl solution has an actual van’t Hoff factor i = 1.5 and Kb = 0.52 K kg mol−1 for the same solvent, what is the elevation in boiling point?
Class 12 · Chemistry
→Which change is most suitable for lowering the vapour pressure of a solution when the solute is non-volatile?
Class 12 · Chemistry
→Which of the following statements about the osmotic pressure of a solution is correct?
Class 12 · Chemistry
→A 0.1 m solution has a freezing-point depression of 0.279 K. If Kf = 1.86 K kg mol−1, what is the van’t Hoff factor i?
Class 12 · Chemistry
→Which of the following properties depends on the number of solute particles present in a solution rather than on the chemical nature of the solute?
Class 12 · Chemistry
→When the number of solute particles in a solution is increased, which group generally changes in the correct direction?
Class 12 · Chemistry
→In a solution, 30% of the solute particles form dimers. The observed molar mass will be how many times the true molar mass?
Class 12 · Chemistry
→Which of the following statements about elevation in boiling point is correct?
Class 12 · Chemistry
→If the molality of a solution is 0.25 m, K_f = 1.86 K kg mol⁻¹, and the van’t Hoff factor is i = 2, what is the magnitude of the depression in freezing point?
Class 12 · Chemistry
→One litre each of 0.1 M glucose and 0.1 M NaCl solutions are considered separately. Assuming complete dissociation of NaCl and equal temperature, whose osmotic pressure will be higher and by what factor?
Class 12 · Chemistry
→An ideal solution has an osmotic pressure of 2.46 atm at 300 K. At the same concentration, what will its osmotic pressure be at 600 K?
Class 12 · Chemistry
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