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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।

ChemistryWhen is the formula i = 1 + α(n − 1) appropriate?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 10EasyChemistryIf a solute has i = 0.625 and undergoes only dimerisation, how many times the true molar mass will be observed?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 13MediumChemistryIf i = 0.8 and the substance undergoes only dimerisation, how will its boiling-point elevation compare with that of a normal solute at the same molality?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 11EasyChemistryWhich statement is correct when the value of i is less than one?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 10EasyChemistryIn an experiment, the relative lowering of vapour pressure is 30% greater than the normal value. What should i be taken as?Class 12Chapter 01: Solutions4: Vapour PressureLevel 6EasyChemistryAt the same concentration, which solution will show the highest colligative property if dissociation is complete?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 8MediumChemistryIf a solute has i = 1.6, how will its osmotic pressure compare with that of a normal solute of the same molality?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 5EasyChemistryWhich statement gives the correct relation between i and particle number?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 5EasyChemistryAt the same molality, which solution gives the lowest osmotic pressure near the ideal limiting case?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 5EasyChemistryA colligative property doubles while the masses of solute and solvent remain the same. What is the most likely reason?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 5EasyChemistryA colligative experiment gives i = 1. Which conclusion is safest?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 4EasyChemistryIn the osmotic-pressure method, from which ratio can i be understood directly?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 5EasyChemistryAt the same molality, NaCl solution shows a freezing-point depression about 1.8 times that of glucose. What is the correct conclusion about NaCl?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 10MediumChemistryWhich pair is correctly matched?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 4EasyChemistryA student writes i = Mobs/Mtrue instead of the correct relation. What kind of mistake can this cause?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 6EasyChemistryA substance X dissociates in water according to X → 2Y + Z, and 40% of X dissociates. What is the van’t Hoff factor i?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 8EasyChemistryWhich statement correctly relates abnormal molar mass to colligative properties?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 4EasyChemistryIf the relative lowering of vapour pressure is half the expected value for a normal solute, what is i approximately?Class 12Chapter 01: Solutions4: Vapour PressureLevel 6EasyChemistryIn which situation is the molar mass calculated from relative lowering of vapour pressure most likely to be lower than the true value?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 6EasyChemistryAmong solutions of equal molality, which gives the maximum depression in freezing point if dissociation is complete?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 5Easy