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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 two solutions have the same solvent and same number of effective solute particles at the same temperature, how will their lowering of vapour pressure compare?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 11Medium ChemistryIn a dilute solution containing a non-volatile solute, the lowering of vapour pressure is approximately proportional to what?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 10Easy ChemistryIf the actual pressure-composition graph lies below the ideal line, which conclusion is appropriate?Class 12Chapter 01: Solutions4: Vapour PressureLevel 10Easy ChemistryIf the actual pressure-composition graph lies above the ideal line, which conclusion is correct?Class 12Chapter 01: Solutions4: Vapour PressureLevel 10Easy ChemistryAccording to Raoult's law, what is the nature of graph between total vapour pressure and liquid composition for an ideal binary solution?Class 12Chapter 01: Solutions4: Vapour PressureLevel 11Medium ChemistryWater boils at lower temperature on a hill station. What is the correct vapour-pressure-based reason?Class 12Chapter 01: Solutions4: Vapour PressureLevel 9Easy ChemistryIf vapour pressure of a liquid becomes equal to external pressure, which event can begin?Class 12Chapter 01: Solutions4: Vapour PressureLevel 9Easy ChemistryIf all liquid in a closed vessel has completely converted into vapour, which caution about vapour pressure is correct?Class 12Chapter 01: Solutions4: Vapour PressureLevel 12Medium ChemistryIn a closed vessel, surface area of a liquid is increased while temperature is kept constant. What is the final effect on equilibrium vapour pressure?Class 12Chapter 01: Solutions4: Vapour PressureLevel 10Medium ChemistryIf a liquid has very low vapour pressure, which pair about its intermolecular attraction and boiling point is correct?Class 12Chapter 01: Solutions4: Vapour PressureLevel 9Easy ChemistryWhy is relative lowering of vapour pressure unitless?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 9Easy ChemistryIf the solvent mole fraction is 0.6 and the pure solvent vapour pressure is 150 kPa, what is the lowering of vapour pressure?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 10Easy ChemistryThe vapour pressure of a solution is 10% lower than that of the pure solvent. Assuming a non-volatile solute, what is the mole fraction of the solvent?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 10Easy ChemistryWhat is the main reason for negative deviation in a mixture of acetone and chloroform?Class 12Chapter 01: Solutions4: Vapour PressureLevel 12Medium ChemistryWhich pair is more likely to form a nearly ideal solution?Class 12Chapter 01: Solutions4: Vapour PressureLevel 11Medium ChemistryWhy are heat of mixing and volume change nearly zero in an ideal solution?Class 12Chapter 01: Solutions4: Vapour PressureLevel 10Medium ChemistryWhy does the boiling point of a solution increase when a non-volatile solute is added?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 10Easy ChemistryIf vapour pressure is less than external pressure, which statement about boiling at that temperature is correct?Class 12Chapter 01: Solutions4: Vapour PressureLevel 9Easy ChemistryIn an ideal binary solution, the pure vapour pressure of component A is lower than that of component B. At equal liquid mole fractions, which component will be less abundant in the vapour?Class 12Chapter 01: Solutions4: Vapour PressureLevel 10Easy ChemistryIn which situation will the vapour pressure of a solution remain nearly equal to that of the pure solvent?Class 12Chapter 01: Solutions4: Vapour PressureLevel 9Easy