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Class 12 · Chemistry
→If 25% of the molecules of a solute associate to form trimers, what is its van’t Hoff factor?
Class 12 · Chemistry
→Which of the following colligative properties decreases as the number of solute particles in a solution increases?
Class 12 · Chemistry
→If the vapour pressure of a solution is lower than that of the pure solvent, what is the main reason?
Class 12 · Chemistry
→Two solutions are separated by a semipermeable membrane. The left side contains 0.2 M glucose, and the right side contains 0.1 M completely dissociated NaCl. What is the net flow of water?
Class 12 · Chemistry
→A solution of NaCl is 75% dissociated. What is the van’t Hoff factor (i) for this solution?
Class 12 · Chemistry
→If the freezing point of a solution is 271.9 K and that of the pure solvent is 273.0 K, what is the depression in freezing point?
Class 12 · Chemistry
→In a solution, the observed molar mass of a solute is half of its normal value. What is its van’t Hoff factor (i)?
Class 12 · Chemistry
→Which solution will have the lowest freezing point if all have molality 0.1 m and dissociation is complete?
Class 12 · Chemistry
→A 0.2 m solution of a nonelectrolyte has ΔTb = 0.102 K. In the same solvent, what will be the approximate ΔTb of a 0.1 m completely dissociated NaCl solution?
Class 12 · Chemistry
→If the temperature is increased while measuring the osmotic pressure and the concentration remains constant, what happens to the osmotic pressure?
Class 12 · Chemistry
→If the mole fraction of the solute in a solution is 0.05 and the vapour pressure of the pure solvent is 100 mmHg, what is the approximate vapour pressure of the solution, assuming the solute is non-volatile?
Class 12 · Chemistry
→Which solution will have the highest osmotic pressure if all have molarity 0.1 M, the temperature is the same, and dissociation is complete?
Class 12 · Chemistry
→A solution has a freezing-point depression of 0.372 K. In the same solvent and at the same molality, if the solute completely forms dimers, what will be the new freezing-point depression?
Class 12 · Chemistry
→A solution contains 18 g of glucose in 1 kg of water. The molar mass of glucose is 180 g mol⁻¹ and Kf = 1.86 K kg mol⁻¹. What is the depression in freezing point?
Class 12 · Chemistry
→Which of the following is not a colligative property?
Class 12 · Chemistry
→A solute is found to have a van’t Hoff factor (i) equal to 0.5. What is the most likely explanation?
Class 12 · Chemistry
→If a solvent has a higher Kf, which conclusion is correct for the same molality of a non-volatile solute?
Class 12 · Chemistry
→Solution A contains 0.1 m glucose and solution B contains 0.1 m completely dissociated NaCl. Which solution will have the higher boiling point?
Class 12 · Chemistry
→In which of the following situations is the van’t Hoff factor i expected to be less than 1?
Class 12 · Chemistry
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