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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 is the vapour pressure of pure solvent needed while measuring lowering of vapour pressure?Class 12Chapter 01: Solutions4: Vapour PressureLevel 3EasyChemistryA liquid and its vapour are at equilibrium in a closed vessel. If temperature is suddenly increased, what happens to the rate of evaporation before a new equilibrium is reached?Class 12Chapter 01: Solutions4: Vapour PressureLevel 4MediumChemistryIn a solution containing a non-volatile solute, the mole fraction of solvent is 0.85. If the vapour pressure of the pure solvent is 200 kilopascal, what is the vapour pressure of the solution?Class 12Chapter 01: Solutions4: Vapour PressureLevel 3EasyChemistryIf the actual vapour pressure of a solution is higher than the value predicted by Raoult’s law, what may be the reason?Class 12Chapter 01: Solutions4: Vapour PressureLevel 5MediumChemistryIf the actual vapour pressure of a solution is lower than the pressure predicted by Raoult’s law, what type of deviation is it?Class 12Chapter 01: Solutions4: Vapour PressureLevel 3EasyChemistryAccording to Raoult’s law, what will be the value of p when x = 1?Class 12Chapter 01: Solutions4: Vapour PressureLevel 2EasyChemistryFor which of two liquids may the increase in vapour pressure with temperature appear more noticeable?Class 12Chapter 01: Solutions4: Vapour PressureLevel 4MediumChemistryIf adding a non-volatile solute causes only a small lowering of vapour pressure, what can be inferred about the amount of solute?Class 12Chapter 01: Solutions4: Vapour PressureLevel 3EasyChemistryOn what basis is the order of lowering of vapour pressure decided?Class 12Chapter 01: Solutions4: Vapour PressureLevel 5MediumChemistryIn an ideal solution, the partial vapour pressure of component A is 40 kilopascal and that of component B is 25 kilopascal. What is the total vapour pressure?Class 12Chapter 01: Solutions4: Vapour PressureLevel 2EasyChemistryIf a liquid attains vapour pressure equal to external pressure at a lower temperature, how will its boiling point be?Class 12Chapter 01: Solutions4: Vapour PressureLevel 2EasyChemistryThe vapour pressure of a solution is lower than that of the pure solvent. Which effect is directly connected with this?Class 12Chapter 01: Solutions4: Vapour PressureLevel 5MediumChemistryIn a solution, the lowering of vapour pressure is 5 kilopascal and the vapour pressure of the pure solvent is 50 kilopascal. What is the relative lowering?Class 12Chapter 01: Solutions4: Vapour PressureLevel 3EasyChemistryIn which condition is the normal boiling point of a liquid defined?Class 12Chapter 01: Solutions4: Vapour PressureLevel 3EasyChemistryWhen the rates of evaporation and condensation become equal, what is established in a closed vessel?Class 12Chapter 01: Solutions4: Vapour PressureLevel 3EasyChemistryAt the same temperature, which liquid will have lower vapour pressure?Class 12Chapter 01: Solutions4: Vapour PressureLevel 2EasyChemistryWhat is the main reason vapour pressure depends on temperature?Class 12Chapter 01: Solutions4: Vapour PressureLevel 3EasyChemistryPure vapour pressures of components A and B are 100 and 60 kilopascal, respectively. If the mole fractions of both are 0.5, what is the total vapour pressure of the ideal solution?Class 12Chapter 01: Solutions4: Vapour PressureLevel 5MediumChemistryIn an ideal binary solution, the mole fraction of component A is 0.3. What will be the mole fraction of component B?Class 12Chapter 01: Solutions4: Vapour PressureLevel 2EasyChemistryWhich statement is correct about the relation between vapour pressure and boiling point?Class 12Chapter 01: Solutions4: Vapour PressureLevel 3Easy

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