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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।

ChemistryA solution has vapour pressure 15 percent lower than the pure solvent. In a dilute solution, what is the approximate mole fraction of solute?Class 12Chapter 01: Solutions4: Vapour PressureLevel 4Easy ChemistryIf the mole fraction of solvent is 0.6, what is the mole fraction of solute in a solution containing a non-volatile solute?Class 12Chapter 01: Solutions4: Vapour PressureLevel 2Easy ChemistryAt the same temperature, which will have higher vapour pressure: pure water or a dilute salt solution in water?Class 12Chapter 01: Solutions4: Vapour PressureLevel 3Easy ChemistryIn a solution, the mole fraction of solute is 0.2. For a dilute solution, what will be the approximate relative lowering of vapour pressure?Class 12Chapter 01: Solutions4: Vapour PressureLevel 4Easy ChemistryIf a solution shows negative deviation from Raoult’s law, what can be said about the attraction between molecules?Class 12Chapter 01: Solutions4: Vapour PressureLevel 5Medium ChemistryIf a solution shows positive deviation from Raoult’s law, how will its vapour pressure compare with the ideal value?Class 12Chapter 01: Solutions4: Vapour PressureLevel 5Medium ChemistryWhich solution is more likely to follow Raoult’s law ideally?Class 12Chapter 01: Solutions4: Vapour PressureLevel 5Medium ChemistryThe vapour pressure of pure solvent is 40 kilopascal and that of the solution is 36 kilopascal. What is the lowering of vapour pressure?Class 12Chapter 01: Solutions4: Vapour PressureLevel 2Easy ChemistryIf the amount of non-volatile solute is increased, what will be the effect on the vapour pressure of the solvent?Class 12Chapter 01: Solutions4: Vapour PressureLevel 3Easy ChemistryWhat is the vapour-pressure-related reason for faster cooking in a pressure cooker?Class 12Chapter 01: Solutions4: Vapour PressureLevel 3Easy ChemistryWhy is correct measurement of vapour pressure difficult in an open vessel?Class 12Chapter 01: Solutions4: Vapour PressureLevel 4Medium ChemistryAt the same temperature, one of two liquids evaporates faster. What is the correct conclusion about that liquid?Class 12Chapter 01: Solutions4: Vapour PressureLevel 2Easy ChemistryIf the solute in a solution is non-volatile, from where does the total vapour pressure mainly come?Class 12Chapter 01: Solutions4: Vapour PressureLevel 2Easy ChemistryA volatile component has a pure vapour pressure of 120 kilopascal and a mole fraction of 0.25 in the solution. What is its partial vapour pressure?Class 12Chapter 01: Solutions4: Vapour PressureLevel 3Easy ChemistryIn an ideal solution, components A and B are both volatile. If the mole fraction of A increases, what happens to the partial vapour pressure of B?Class 12Chapter 01: Solutions4: Vapour PressureLevel 4Medium ChemistryIn which condition is a liquid most likely to have the highest vapour pressure?Class 12Chapter 01: Solutions4: Vapour PressureLevel 2Easy ChemistryWhy does water boil at a lower temperature at high altitude?Class 12Chapter 01: Solutions4: Vapour PressureLevel 2Easy ChemistryWhat happens when the vapour pressure of a liquid becomes equal to external pressure?Class 12Chapter 01: Solutions4: Vapour PressureLevel 2Easy ChemistryIn a solution, the mole fraction of solvent is 0.9. If the vapour pressure of the pure solvent is 50 kilopascal, what is the vapour pressure of the solvent in the solution?Class 12Chapter 01: Solutions4: Vapour PressureLevel 3Easy ChemistryWhy is lowering of vapour pressure considered a colligative property?Class 12Chapter 01: Solutions4: Vapour PressureLevel 3Easy