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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 volatile binary ideal solution, the partial pressure of component A is 45 kPa and that of component B is 15 kPa. What is the mole fraction of A in the vapour phase?Class 12Chapter 01: Solutions4: Vapour PressureLevel 7Medium ChemistryWhich statement about heat change on mixing is suitable for a solution showing negative deviation?Class 12Chapter 01: Solutions4: Vapour PressureLevel 6Easy ChemistryWhich statement is most suitable for the volume change on mixing in a solution showing positive deviation from Raoult’s law?Class 12Chapter 01: Solutions4: Vapour PressureLevel 6Easy ChemistryIf the total vapour pressure of a real solution is less than the pressure predicted by Raoult’s law, what type of molecular attraction is more likely?Class 12Chapter 01: Solutions4: Vapour PressureLevel 6Easy ChemistryIn an ideal binary solution, the pure vapour pressure of component A is 240 kPa and that of component B is 80 kPa. The mole fraction of A is 0.25. What is the total vapour pressure?Class 12Chapter 01: Solutions4: Vapour PressureLevel 7Medium ChemistryA solution has solute mole fraction 0.12. The vapour pressure of pure solvent is 75 kPa. What is the vapour pressure of the solution?Class 12Chapter 01: Solutions4: Vapour PressureLevel 6Easy ChemistryIn an ideal solution, pure solvent vapour pressure is 100 kPa and solution vapour pressure is 85 kPa. What is the mole fraction of the non-volatile solute?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 10Medium ChemistryWhat basic idea does Raoult's law express in the study of vapour pressure?Class 12Chapter 01: Solutions4: Vapour PressureLevel 8Easy ChemistryIn a volatile binary liquid solution, the vapour phase is generally richer in which component?Class 12Chapter 01: Solutions4: Vapour PressureLevel 9Easy ChemistryHow can boiling of a liquid at hill stations be explained using vapour pressure and external pressure?Class 12Chapter 01: Solutions4: Vapour PressureLevel 10Medium ChemistryIf solvent–solute attraction in a solution is very strong, what is the most likely effect on vapour pressure?Class 12Chapter 01: Solutions4: Vapour PressureLevel 9Easy ChemistryIf solvent–solute attraction in a solution is very weak, what is the most likely effect on vapour pressure?Class 12Chapter 01: Solutions4: Vapour PressureLevel 9Easy ChemistryWhy is heat change on forming an ideal solution considered nearly zero?Class 12Chapter 01: Solutions4: Vapour PressureLevel 10Medium ChemistryA non-volatile solute that lowers vapour pressure effectively reduces the number of solvent molecules at which place?Class 12Chapter 01: Solutions4: Vapour PressureLevel 8Easy ChemistryWhich statement shows that vapour pressure is an equilibrium property?Class 12Chapter 01: Solutions4: Vapour PressureLevel 8Easy ChemistryIn an ideal solution, if pure vapour pressure of component A is higher than that of component B, which component generally contributes more to vapour phase when mole fractions are equal?Class 12Chapter 01: Solutions4: Vapour PressureLevel 10Medium ChemistryIn which situation is direct use of Raoult's law safest?Class 12Chapter 01: Solutions4: Vapour PressureLevel 10Medium ChemistryWhat should be the first precaution in a numerical question on vapour pressure?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 10Medium ChemistryIf a solute dissociates in solution to produce more particles, what is the effect on lowering of vapour pressure?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 11Medium ChemistryIf a solute associates in the liquid to form larger particles, what happens to lowering of vapour pressure for the same mass?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 11Medium