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Class 12 · Chemistry
→In a benzene solution containing a non-volatile solute, the relative lowering of vapour pressure is less than the value expected for ideal behaviour. What does this indicate?
Class 12 · Chemistry
→If the mole fraction of a non-volatile solute in an ideal dilute solution is 0.03, what is the relative lowering of vapour pressure?
Class 12 · Chemistry
→If the boiling point of a solution is \(100.78^\circ C\) and that of pure water is \(100.00^\circ C\), what is the elevation in boiling point?
Class 12 · Chemistry
→Which of the following properties ideally depends only on the number of solute particles present in a solution and not on their chemical nature?
Class 12 · Chemistry
→A solution contains 0.010 mol of solute in 1.00 L of solution. If its van’t Hoff factor is i = 2.0, what effective concentration should be used to calculate its osmotic pressure at 300 K?
Class 12 · Chemistry
→A solution has a freezing-point depression, ΔT_f = 0.372 K. If the cryoscopic constant is K_f = 1.86 K kg mol⁻¹ and the molality is m = 0.100 mol kg⁻¹, what is the van’t Hoff factor (i)?
Class 12 · Chemistry
→In trimer formation, three molecules associate to form one particle. If association is complete, what is the van’t Hoff factor (i)?
Class 12 · Chemistry
→An electrolyte XY undergoes 30% dissociation. What will be its van’t Hoff factor (i)?
Class 12 · Chemistry
→If the amount of a non-volatile solute is increased in a solution, how will the vapour pressure of the solution change compared with that of the pure solvent?
Class 12 · Chemistry
→Which statement is most accurate for colligative properties?
Class 12 · Chemistry
→A cell placed in a hypotonic solution may swell. What is the correct colligative reason?
Class 12 · Chemistry
→If a blood cell is placed in a hypertonic solution, why will water move outward?
Class 12 · Chemistry
→A solution has a relative lowering of vapour pressure of 0.25. If the total number of moles in the solution is 4, how many moles of solute are present?
Class 12 · Chemistry
→If 1 mole of solute is dissolved in 500 g of solvent and the van’t Hoff factor is 2, what is the effective molality?
Class 12 · Chemistry
→A 0.5 m non-dissociating solution has an elevation in boiling point of 0.26 K. In the same solvent, what will be the elevation for a 0.5 m solute with i = 3?
Class 12 · Chemistry
→For a solute, the van’t Hoff factor (i) is observed to be 0.75. What type of particle change does this indicate?
Class 12 · Chemistry
→The osmotic pressure of a solution becomes double at the same temperature. If i remains unchanged, what change must have occurred in concentration?
Class 11 · Chemistry
→If a solution has a boiling-point elevation of 1.04 K, with Kb = 0.52 K kg mol⁻¹ and molality 1 m, what is the van’t Hoff factor i?
Class 12 · Chemistry
→A solution has i = 2.5 and molality 0.2 m. If Kf = 1.86 K kg mol⁻¹, what is ΔTf?
Class 12 · Chemistry
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