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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।

ChemistryIn a pressure-composition graph, the actual line is below the ideal line. Which azeotrope is more likely to form?Class 12Chapter 01: Solutions4: Vapour PressureLevel 7Medium ChemistryIn a pressure-composition graph, the actual line is above the ideal line. Which azeotrope is more likely to form?Class 12Chapter 01: Solutions4: Vapour PressureLevel 7Medium ChemistryIn which situation is deviation from Raoult's law expected to be minimum?Class 12Chapter 01: Solutions4: Vapour PressureLevel 6Easy ChemistryWhich statement explains the effect of a non-volatile solute most correctly?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 6Easy ChemistryIf a solution has vapour pressure 25% lower than that of the pure solvent, what is its vapour pressure when the pure solvent pressure is 80 kPa?Class 12Chapter 01: Solutions4: Vapour PressureLevel 5Easy ChemistryA solution has solvent mole fraction 0.65. The vapour pressure of the pure solvent is 40 kPa. What is the lowering of vapour pressure?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 6Easy ChemistryIf solute mole fraction is increased and the solute is non-volatile, what happens to lowering of vapour pressure?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 6Easy ChemistryWhy does adding a non-volatile solute increase the boiling point of a solution?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 7Medium ChemistryIf temperature is increased, what is the basic reason for increase in equilibrium vapour pressure of a pure liquid?Class 12Chapter 01: Solutions4: Vapour PressureLevel 6Easy ChemistryWhy does equilibrium vapour pressure not change when surface area of a liquid is increased?Class 12Chapter 01: Solutions4: Vapour PressureLevel 7Medium ChemistryWhat is the most important difference between vapour pressure and rate of evaporation?Class 12Chapter 01: Solutions4: Vapour PressureLevel 7Medium ChemistryWhy is vapour phase richer in the more volatile component?Class 12Chapter 01: Solutions4: Vapour PressureLevel 6Easy ChemistryWhat happens to total vapour pressure when mole fraction of the less volatile component is increased in an ideal solution?Class 12Chapter 01: Solutions4: Vapour PressureLevel 6Easy ChemistryIf the mole fraction of the more volatile component is increased in an ideal solution, in which direction will total vapour pressure change?Class 12Chapter 01: Solutions4: Vapour PressureLevel 6Easy ChemistryIn an ideal solution, what is the relation between total vapour pressure and liquid composition?Class 12Chapter 01: Solutions4: Vapour PressureLevel 7Medium ChemistryIf observed molar mass of a solute is greater than its actual value, which behaviour is likely?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 7Medium ChemistryIf observed molar mass of a solute is less than its actual value, which behaviour is likely?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 7Medium ChemistryWhy can lowering of vapour pressure be used to determine molar mass of a solute?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 7Medium ChemistryIn an ideal solution, the mole fraction of component A in the vapour phase is 0.4 and the total pressure is 200 kPa. What is the partial pressure of A?Class 12Chapter 01: Solutions4: Vapour PressureLevel 5Easy ChemistryIn an ideal binary solution, the pure vapour pressures of components A and B are 50 kPa and 150 kPa, respectively. If the mole fraction of A is 0.7, what is the total vapour pressure?Class 12Chapter 01: Solutions4: Vapour PressureLevel 7Medium