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Class 12 · Chemistry · Easy
→Which of the following statements about colligative properties is correct?
Class 12 · Chemistry · Medium
→Two solutions have equal osmotic pressure at the same temperature. If their solutes are non-dissociating, what can be said about their molar concentrations?
Class 12 · Chemistry · Medium
→A solution has ΔTf = 1.86 K, Kf = 1.86 K kg mol⁻¹, and molality m = 0.5 mol kg⁻¹. What is the van’t Hoff factor i?
Class 12 · Chemistry · Medium
→If the solute is volatile, why must the simple vapour-pressure-lowering relation for a non-volatile solute be used carefully?
Class 12 · Chemistry · Easy
→A student used Kf while calculating ΔTb. What is the mistake?
Class 12 · Chemistry · Easy
→The osmotic pressure of a solution is 2 units. If its concentration is tripled at the same temperature, what will be the new osmotic pressure?
Class 12 · Chemistry · Easy
→Which concentration unit is used directly in calculating freezing-point depression and boiling-point elevation?
Class 12 · Chemistry · Medium
→If the vapour pressure of a pure solvent is 80 and the vapour pressure of the solvent in a solution is 72, what is the relative lowering of vapour pressure?
Class 12 · Chemistry · Easy
→If the mole fraction of the solute is 0.15, what will be the mole fraction of the solvent in a binary solution?
Class 12 · Chemistry · Easy
→What is the sum of the mole fraction of the solute and the mole fraction of the solvent in a binary solution?
Class 12 · Chemistry · Medium
→If AB completely dissociates into A⁺ and B⁻, how will its colligative effect compare with that of a non-dissociating solute at the same molality?
Class 12 · Chemistry · Medium
→Why does association of a solute decrease the observed depression in freezing point?
Class 12 · Chemistry · Easy
→What is the common basis of vapour-pressure lowering, freezing-point depression, boiling-point elevation, and osmotic pressure in a solution?
Class 12 · Chemistry · Easy
→Two solutions of equal volume have concentrations 0.1 mol L⁻¹ and 0.2 mol L⁻¹. At the same temperature, which solution has the higher osmotic pressure?
Class 12 · Chemistry · Easy
→If V and T are constant in the equation πV = nRT, osmotic pressure is proportional to which quantity?
Class 12 · Chemistry · Medium
→Why is the osmotic-pressure method more suitable for determining the molar mass of large molecules?
Class 12 · Chemistry · Medium
→If the mole fraction of a non-volatile solute is increased in a solution, what happens to the lowering of vapour pressure?
Class 12 · Chemistry · Easy
→If the mole fraction of the solvent is 0.9 and the vapour pressure of the pure solvent is 100, what will be the vapour pressure of the solvent in the solution?
Class 12 · Chemistry · Medium
→According to Raoult's law for a non-volatile solute, the partial vapour pressure of the solvent is proportional to what?
Class 12 · Chemistry · Easy
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