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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।

ChemistryA student sees i < 1 and writes dissociation. What is the correct correction?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 1Easy ChemistryA 1:3 electrolyte is 50% dissociated. What is its van’t Hoff factor?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 2Medium ChemistryIf the osmotic pressure of a solute is 20% lower than the normal value, what are i and the likely cause?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 2Easy ChemistryFor 25% dissociation of an AB₃ salt, what fraction of the true molar mass will be its observed molar mass?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 3Medium ChemistryWhich option gives the correct relation for m-fold association?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 1Easy ChemistryIn a solution, 0.01 mol of A₂B₃ undergoes 60% dissociation. How many moles of effective particles will be present?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 3Medium ChemistryIf 60% of a solute remains as normal molecules and 40% of it dimerises, what is the van’t Hoff factor?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 2Medium ChemistryIf a solute is normally undissociated and does not undergo association, what should the van’t Hoff factor be by all four colligative methods?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 1Easy ChemistryThe molar mass determined from osmotic pressure is greater than the true molar mass. Which phenomenon does this indicate?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 10Easy ChemistryIf the molar mass obtained by osmotic pressure is lower than the true molar mass, which conclusion is most suitable?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 10Easy ChemistryA substance has a true molar mass of 72 g mol−1 and i = 2.4. What is its observed molar mass?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 11Easy ChemistryWhich option gives the correct limiting value of i for complete dimerisation?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 10Easy ChemistryFor an AB2 salt, i = 1.1 is obtained. What is the safest conclusion?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 11Easy ChemistryWhich statement correctly gives the cause of abnormal molar mass?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 10Easy ChemistryThe relative lowering of vapour pressure of a solute is 40% higher than expected. What value of i should be taken?Class 12Chapter 01: Solutions4: Vapour PressureLevel 11Easy ChemistryIf a solute has i = 0.9, how will its boiling-point elevation compare with that of a normal solute of the same molality?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 11Easy ChemistryIn which situation is i most likely to be much greater than 1?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 10Easy ChemistryAt the same molality, a solution has a freezing-point depression 0.6 times that of a normal solute. What is its observed molar mass relative to the true molar mass?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 12Easy ChemistryWhich observation most directly supports a higher molar mass caused by association?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 10Easy ChemistryA solute has a true molar mass of 150 g mol−1, while the value measured by osmotic pressure is 100 g mol−1. What is i?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 12Easy