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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।

ChemistryWhat is the pure vapour pressure of a more volatile component like?Class 12Chapter 01: Solutions4: Vapour PressureLevel 3EasyChemistryWhy does increasing the surface area of a liquid not change its equilibrium vapour pressure?Class 12Chapter 01: Solutions4: Vapour PressureLevel 4EasyChemistryIn an ideal solution, liquid mole fraction of A is 0.60. Pure pressure of A is 50 kPa and of B is 100 kPa. What is the total pressure?Class 12Chapter 01: Solutions4: Vapour PressureLevel 6MediumChemistryThe vapour pressure of a solution is 20 percent lower than that of pure solvent. Assuming non-volatile solute, what is the mole fraction of solvent?Class 12Chapter 01: Solutions4: Vapour PressureLevel 5EasyChemistryWhy does relative lowering of vapour pressure have no unit?Class 12Chapter 01: Solutions4: Vapour PressureLevel 3EasyChemistryIf unlike molecular attraction becomes very strong while mixing two liquids, what happens to vapour pressure?Class 12Chapter 01: Solutions4: Vapour PressureLevel 4EasyChemistryWhen like and unlike molecular attractions in a mixture of two liquids are nearly equal, what type of solution is formed?Class 12Chapter 01: Solutions4: Vapour PressureLevel 4EasyChemistryIn a binary solution, total vapour pressure is 90 kPa and partial pressure of component A is 36 kPa. What is mole fraction of A in vapour?Class 12Chapter 01: Solutions4: Vapour PressureLevel 5EasyChemistryIf vapour pressure has become equal to external pressure, what can be said about the liquid?Class 12Chapter 01: Solutions4: Vapour PressureLevel 3EasyChemistryThe vapour pressure of a liquid increases rapidly with temperature. What is the most suitable reason?Class 12Chapter 01: Solutions4: Vapour PressureLevel 4EasyChemistryIf the observed colligative effect is greater than expected, what may it indicate about the solute?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 5EasyChemistryIf observed molar mass of solute is greater than the actual value, what can it indicate about solute behaviour?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 6MediumChemistryWhy is relative lowering of vapour pressure useful in finding molar mass of a solute?Class 12Chapter 01: Solutions4: Vapour PressureLevel 5MediumChemistryIn an ideal binary solution, pure vapour pressure of A is 300 kPa and that of B is 100 kPa. Mole fraction of A is 0.25. What is total vapour pressure?Class 12Chapter 01: Solutions4: Vapour PressureLevel 6MediumChemistryIf actual vapour pressure of a solution is greater than ideal value, what indication about volume change on mixing may be obtained?Class 12Chapter 01: Solutions4: Vapour PressureLevel 6MediumChemistryIf actual vapour pressure of a solution is lower than ideal value, what indication about energy change on mixing may be obtained?Class 12Chapter 01: Solutions4: Vapour PressureLevel 6MediumChemistryFor an ideal solution, what is the usual nature of the graph between total vapour pressure and liquid composition?Class 12Chapter 01: Solutions4: Vapour PressureLevel 5EasyChemistryA solution has solvent mole fraction 0.92. The vapour pressure of pure solvent is 75 kPa. What is the lowering of vapour pressure?Class 12Chapter 01: Solutions4: Vapour PressureLevel 5EasyChemistryIf more non-volatile solute is added to a solution, what happens to the vapour pressure of the solvent?Class 12Chapter 01: Solutions4: Vapour PressureLevel 4EasyChemistryWhich option gives the correct mathematical meaning of Raoult's law?Class 12Chapter 01: Solutions4: Vapour PressureLevel 3Easy

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