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Class 12 Mcq

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

ChemistryWhy can vapour pressure of an acetone and chloroform mixture be lower than the ideal value?Class 12Chapter 01: Solutions4: Vapour PressureLevel 6Easy ChemistryWhich pair may be considered a good example of a nearly ideal solution?Class 12Chapter 01: Solutions4: Vapour PressureLevel 6Easy ChemistryFor formation of an ideal solution, what should be the relation between attractions among like and unlike molecules?Class 12Chapter 01: Solutions4: Vapour PressureLevel 6Easy ChemistryA liquid has very low vapour pressure. Which estimate about its normal boiling point is more correct?Class 12Chapter 01: Solutions4: Vapour PressureLevel 6Easy ChemistryA liquid has very high vapour pressure. Which statement about its intermolecular forces and volatility is correct?Class 12Chapter 01: Solutions4: Vapour PressureLevel 6Easy ChemistryWhat is the correct reason for the decrease in the boiling point of water at a high-altitude place?Class 12Chapter 01: Solutions4: Vapour PressureLevel 5Easy ChemistryWhen the vapour pressure of a liquid becomes equal to the external pressure, which condition is reached?Class 12Chapter 01: Solutions4: Vapour PressureLevel 5Easy ChemistryA solution has vapour pressure 18% lower than that of the pure solvent. What is the mole fraction of the solvent?Class 12Chapter 01: Solutions4: Vapour PressureLevel 6Easy ChemistryWhy does relative lowering of vapour pressure have no unit?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 5Easy ChemistryIf solute particles associate, why is lowering of vapour pressure less than expected?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 7Medium ChemistryWhy can lowering of vapour pressure become greater when solute particles dissociate in a solution?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 7Medium ChemistryThe vapour pressure of a real solution is found below the ideal line. What type of molecular attraction does this indicate?Class 12Chapter 01: Solutions4: Vapour PressureLevel 6Easy ChemistryThe vapour pressure of a real solution is found above the ideal line. What type of molecular attraction does this indicate?Class 12Chapter 01: Solutions4: Vapour PressureLevel 6Easy ChemistryIf the liquid mole fraction of component A is 0.6 and its pure vapour pressure is 90 kPa, what is its partial pressure?Class 12Chapter 01: Solutions4: Vapour PressureLevel 5Easy ChemistryAccording to Raoult’s law, the partial vapour pressure of a component is equal to which product?Class 12Chapter 01: Solutions4: Vapour PressureLevel 5Easy ChemistryIf all liquid in a closed vessel is exhausted and only vapour remains, which statement about pressure is correct?Class 12Chapter 01: Solutions4: Vapour PressureLevel 7Medium ChemistryAfter equilibrium is established in a closed vessel, until when will vapour pressure remain nearly unchanged if the amount of liquid is slightly reduced?Class 12Chapter 01: Solutions4: Vapour PressureLevel 6Easy ChemistryIn which situation is formation of a maximum-boiling azeotrope more likely?Class 12Chapter 01: Solutions4: Vapour PressureLevel 7Medium ChemistryIn which situation is formation of a minimum boiling azeotrope more likely?Class 12Chapter 01: Solutions4: Vapour PressureLevel 7Medium ChemistryIf the vapour pressure of a solution is 12% lower than that of the pure solvent, what is the mole fraction of the non-volatile solute?Class 12Chapter 01: Solutions4: Vapour PressureLevel 6Easy