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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 a solute dissociates into ions in solution, how is the observed molar mass generally affected?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 14Medium ChemistryThe van’t Hoff factor is most helpful in explaining which change?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 13Easy ChemistryWhen the number of solute particles changes from the expected value, how may the molar mass appear?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 13Easy ChemistryIn an abnormal molar mass problem, what should be identified first?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 13Easy ChemistryFor partial dimerisation of acetic acid, in what range can i lie?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 14Medium ChemistryWhich substance generally shows i > 1 in aqueous solution because of dissociation?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 12Easy ChemistryWhich option gives the correct reason for abnormal molar mass?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 13Easy ChemistryHow is the van’t Hoff factor used in colligative properties?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 13Easy ChemistryIf one formula unit of a substance gives A⁺ and B⁻ ions in water on complete dissociation, what is the van’t Hoff factor, i?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 12Easy ChemistryWhich solute, when dissolved in benzene, generally has a van’t Hoff factor i less than 1?Class 12Chapter 01: SolutionsLevel 13Hard ChemistryA solution has van’t Hoff factor i = 2.2. If the boiling-point elevation calculated without dissociation is 0.05 K, what is the actual boiling-point elevation?Class 12Chapter 01: SolutionsLevel 14Medium ChemistryIf a non-volatile solute is dissolved in water, what is the main reason for lowering of vapour pressure?Class 12Chapter 01: Solutions4: Vapour PressureLevel 10Medium ChemistryWhat should be checked first in numerical questions on colligative properties?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 9Easy ChemistryWhich option gives a correct pair of colligative properties?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 8Easy ChemistryIf a solution has a much lower freezing point than the pure solvent, which conclusion may be correct?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 10Medium ChemistryWhich statement correctly describes colligative properties?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 9Easy ChemistryIf two solutions have the same number of solute particles but one has higher temperature, which will have higher osmotic pressure?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 9Easy ChemistryWhich colligative property is most suitable for determining the molar mass of proteins and polymers in dilute solutions?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 10Medium ChemistryWhich property depends only on the number of solute particles present in a solution and not on their chemical nature?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 8Easy ChemistryIf \(K_f = 1.86\) and \(\Delta T_f = 0.93\), what is the molality?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 10Easy