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5 Colligative Properties

Class 12 Chemistry के इस tag से जुड़े questions। हर question के साथ chapter, topic, level और difficulty दी गई है।

ChemistryFor a solute, the van’t Hoff factor (i) is observed to be 0.75. What type of particle change does this indicate?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 14MediumChemistryThe osmotic pressure of a solution becomes double at the same temperature. If i remains unchanged, what change must have occurred in concentration?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 14EasyChemistryA solution has i = 2.5 and molality 0.2 m. If Kf = 1.86 K kg mol⁻¹, what is ΔTf?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 14MediumChemistryWhy is the osmotic-pressure method more useful than boiling-point elevation for finding the molar mass of a 0.01 M protein solution?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 14HardChemistryA 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 12Chapter 01: Solutions5: Colligative PropertiesLevel 14HardChemistryIf 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 12Chapter 01: Solutions5: Colligative PropertiesLevel 14MediumChemistryWhy is reverse osmosis useful for obtaining drinking water from seawater?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 14MediumChemistryIf 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 12Chapter 01: Solutions5: Colligative PropertiesLevel 14EasyChemistryFor the same solvent at the same temperature, which observation confirms that depression in freezing point is a colligative property?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 14MediumChemistryIf two solutions are isotonic, which statement is definitely true for them at the same temperature?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 14MediumChemistryWhich colligative property is not directly based on vapour-pressure measurement but requires a semipermeable membrane?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 14EasyChemistryUnder which condition will the van’t Hoff factor be very close to 1?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 14EasyChemistryOne mole of A₂B dissociates completely into 2A⁺ and B²⁻. What is the ideal van’t Hoff factor?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 14MediumChemistryA non-volatile solute lowers the freezing point of a pure solvent. What is the microscopic reason?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 14MediumChemistryIf 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 12Chapter 01: Solutions5: Colligative PropertiesLevel 14MediumChemistryThe 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 12Chapter 01: Solutions5: Colligative PropertiesLevel 14MediumChemistryTwo molecules associate to form one dimer. If the degree of association is 80%, what is the van’t Hoff factor?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 14HardChemistryIf 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 12Chapter 01: Solutions5: Colligative PropertiesLevel 14MediumChemistryIn an ideal dilute solution containing a non-volatile solute, which relation represents the relative lowering of vapour pressure?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 14MediumChemistryWhy does solvent flow opposite to the normal direction during reverse osmosis?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 13Medium