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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।

ChemistryAn acid dimerises in benzene due to hydrogen bonding. Which statement gives the correct effect?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 5Easy ChemistryIf the Kb method gives molar mass 40 g mol−1 while the true value is 58.5 g mol−1, what is the most suitable reason?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 6Easy ChemistryBenzoic acid is nearly dimerised in benzene. How will its molar mass measured by freezing-point depression compare with its true molar mass?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 6Easy ChemistryIn an ideal dilute solution, the molar mass measured from osmotic pressure is half the true molar mass. What is the most suitable conclusion about the solute particles?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 8Easy ChemistryA student calculates the molar mass of AlCl3 by assuming i = 1, although the actual i is 3.4. What is the apparent molar mass relative to the true molar mass?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 7Easy ChemistryA solution has van't Hoff factor i = 1.05. Which explanation is most appropriate?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 6Easy ChemistryAn unknown solute has i = 5. Which cause is most suitable?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 9Easy ChemistryTen percent of a solute forms dimers, 30% forms trimers, and 20% forms tetramers; the rest remains single. What is i?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 17Hard ChemistryA solution has i = 0.48. Which statement is most correct?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 9Easy ChemistryFor a 0.12 m solution, the normal freezing-point depression is 0.24 K and the observed depression is 0.60 K. What is i?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 9Easy ChemistryThe elevation in boiling point is 40% lower than the expected value. What is the apparent molar mass compared with the true mass?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 12Medium ChemistryIf a solute has i = 0.72 and true molar mass 144 g mol⁻¹, what is its apparent molar mass?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 10Easy ChemistryAn MCl₃ salt has i = 2.8. What is its apparent molar mass compared with its true molar mass?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 10Easy ChemistryA solute forms trimers completely. What is the ratio of apparent molar mass to true molar mass?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 10Easy ChemistryA student assumes i = 1 for CaCl2, although the actual i is 2.5. How will the apparent molar mass compare with the true molar mass?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 12Medium ChemistryAn AX₂ salt is 45% dissociated. From 200 initial formula units, how many effective particles will be present?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 13Medium ChemistryA solution has i = 0.90. Which explanation is most appropriate?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 10Easy ChemistryA solute dissociates into two ions and its colligative property is 30% higher than normal. What is the degree of dissociation?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 11Medium ChemistryA colligative property is 25% lower than its normal expected value. If the cause is dimer association, what is the degree of association?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 12Medium ChemistryIf a solute has i = 1, what is the most appropriate meaning in the context of abnormal molar mass?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 6Easy