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Class 12 · Chemistry · Hard
→Why is the osmotic-pressure method more useful than boiling-point elevation for finding the molar mass of a 0.01 M protein solution?
Class 12 · Chemistry · Hard
→A 0.1 m solution shows a depression in freezing point lower than the expected value for a non-dissociated solute. What is the most suitable conclusion?
Class 12 · Chemistry · Medium
→If an electrolyte effectively produces 3.2 particles instead of the four particles expected from complete dissociation, how will its colligative effect compare with complete dissociation?
Class 12 · Chemistry · Medium
→Why is reverse osmosis useful for obtaining drinking water from seawater?
Class 12 · Chemistry · Easy
→If the relative lowering of vapour pressure is 0.10, what is the mole fraction of the solvent in an ideal solution containing a non-volatile solute?
Class 12 · Chemistry · Medium
→For the same solvent at the same temperature, which observation confirms that depression in freezing point is a colligative property?
Class 12 · Chemistry · Medium
→If two solutions are isotonic, which statement is definitely true for them at the same temperature?
Class 12 · Chemistry · Easy
→Which colligative property is not directly based on vapour-pressure measurement but requires a semipermeable membrane?
Class 12 · Chemistry · Medium
→The minimum pressure required to stop osmosis in a solution is 5 atm. What pressure is needed to carry out reverse osmosis?
Class 12 · Chemistry · Medium
→For solutions of equal molality in the same solvent, which factor decides the comparison of ΔTb?
Class 12 · Chemistry · Medium
→A solution has a boiling-point elevation of 0.52 K, and Kb = 0.52 K kg mol⁻¹. If the solute is non-dissociating, what is the molality?
Class 12 · Chemistry · Easy
→Under which condition will the van’t Hoff factor be very close to 1?
Class 12 · Chemistry · Medium
→If 0.1 M glucose and 0.1 M sodium sulfate solutions are at the same temperature, which will ideally have the higher osmotic pressure?
Class 12 · Chemistry · Medium
→One mole of A₂B dissociates completely into 2A⁺ and B²⁻. What is the ideal van’t Hoff factor?
Class 12 · Chemistry · Hard
→If the observed molar mass of a solute is twice its normal molar mass, what is the van’t Hoff factor and which process is indicated?
Class 12 · Chemistry · Medium
→A non-volatile solute lowers the freezing point of a pure solvent. What is the microscopic reason?
Class 12 · Chemistry · Medium
→Why are lowering of vapour pressure and elevation of boiling point closely related?
Class 12 · Chemistry · Medium
→If a 0.2 m urea solution has a freezing-point depression x, what will be the approximate freezing-point depression of an ideal 0.2 m calcium chloride solution?
Class 12 · Chemistry · Medium
→The osmotic pressure of a solution is π at 300 K. If the concentration is kept constant and the temperature is raised to 600 K, what will be the ideal osmotic pressure?
Class 12 · Chemistry · Medium
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