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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।

ChemistryIf solute particles associate with each other, what may happen to lowering of vapour pressure and observed molar mass?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 12Medium ChemistryWhy can an electrolyte solute show greater lowering of vapour pressure than expected?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 11Medium ChemistryWhy is relative lowering of vapour pressure called a colligative property?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 9Easy ChemistryIn a binary solution, the partial pressure of component A is 40 kPa and the total pressure is 100 kPa. What is the mole fraction of component B in the vapour phase?Class 12Chapter 01: Solutions4: Vapour PressureLevel 10Easy ChemistryIn a volatile binary ideal solution, what happens to total vapour pressure when the liquid mole fraction of the more volatile component is increased?Class 12Chapter 01: Solutions4: Vapour PressureLevel 10Easy ChemistryWhich statement is most accurate for an ideal solution?Class 12Chapter 01: Solutions4: Vapour PressureLevel 9Easy ChemistryLiquid and vapour are in equilibrium in a closed vessel. Why does equilibrium vapour pressure increase when temperature rises?Class 12Chapter 01: Solutions4: Vapour PressureLevel 10Easy ChemistryMaximum-boiling azeotrope is associated with which type of vapour-pressure behaviour?Class 12Chapter 01: Solutions4: Vapour PressureLevel 12Medium ChemistryWhich mixture is most likely to form a minimum-boiling azeotrope?Class 12Chapter 01: Solutions4: Vapour PressureLevel 12Medium ChemistryIf the actual vapour pressure of a solution is lower than the ideal value and heat is released on mixing, what deviation is shown?Class 12Chapter 01: Solutions4: Vapour PressureLevel 12Medium ChemistryIf the vapour pressure of a real solution is much higher than the value predicted by Raoult’s law, what molecular behaviour is likely?Class 12Chapter 01: Solutions4: Vapour PressureLevel 12Medium ChemistryWhat is the deeper reason for decrease in vapour pressure when a non-volatile solute is added to a liquid?Class 12Chapter 01: Solutions4: Vapour PressureLevel 9Easy ChemistryIn an ideal solution, the partial pressures of components A and B are 30 kPa and 70 kPa, respectively. What is the mole fraction of B in the vapour phase?Class 12Chapter 01: Solutions4: Vapour PressureLevel 11Medium ChemistryIn a solution, the relative lowering of vapour pressure is 0.15. Assuming a non-volatile solute, what is the mole fraction of the solvent?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 10Easy ChemistryIn an ideal solution, the vapour pressure of pure solvent is 80 kPa and the mole fraction of solvent is 0.75. What is the vapour pressure of the solution?Class 12Chapter 01: Solutions4: Vapour PressureLevel 5Easy ChemistryWhich option gives the most exam-useful correct statement related to vapour pressure?Class 12Chapter 01: Solutions4: Vapour PressureLevel 4Easy ChemistryIf solvent mole fraction in a solution is 0.76, what is the relative lowering of vapour pressure?Class 12Chapter 01: Solutions4: Vapour PressureLevel 4Easy ChemistryIn a solution, pure solvent vapour pressure is 96 kPa and lowering of vapour pressure is 24 kPa. What is the relative lowering?Class 12Chapter 01: Solutions4: Vapour PressureLevel 4Easy ChemistryIf in an ideal solution the partial pressure of A is 55 kPa and that of B is 45 kPa, what is total pressure?Class 12Chapter 01: Solutions4: Vapour PressureLevel 3Easy ChemistryWhich statement shows that vapour pressure lowering is connected with colligative properties?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 4Easy