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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 salt M₂X has an apparent molar mass equal to 0.5 times its true molar mass. What is its degree of dissociation?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 13MediumChemistryAn acid has true molar mass 60 g mol⁻¹ and apparent molar mass 96 g mol⁻¹ in benzene. If it only forms dimers, what is the approximate degree of association?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 15HardChemistryA solute has i = 1.75. If it dissociates into two ions, what is its apparent molar mass compared with the true molar mass?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 10MediumChemistryA freezing-point depression experiment gives i = 2.7 for an unknown solute. If it is of type AB₂, what is the approximate degree of dissociation?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 13MediumChemistryFor a solution, i = 0.70. Which statement is correct?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 7EasyChemistryAn AB electrolyte is 40% dissociated. From 100 initial formula units, how many effective particles will be present?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 12MediumChemistryTwenty percent of a solute’s particles form dimers and 80% remain as single particles. Starting with 100 particles, what is the effective number of particles?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 12MediumChemistryIn which case will the apparent molar mass be the highest?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 10MediumChemistryIn which solution is the apparent molar mass most likely to be the lowest?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 10MediumChemistryWhy is the osmotic pressure of a NaCl solution higher than that of a glucose solution of the same concentration?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 8EasyChemistryA solute A has 25% of its particles forming A₄. What is the value of i?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 13MediumChemistryA solute should normally show a freezing-point depression of 0.48 K, but the observed value is 0.24 K. If it forms only dimers, what is the degree of association?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 13MediumChemistryIf AlCl₃ is 50% dissociated, what is its van’t Hoff factor?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 11MediumChemistryIf CaCl₂ undergoes 80% dissociation in a solution, what is the value of i?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 11MediumChemistryIn a solution, 30% of the solute molecules form dimers. What is the value of i?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 11MediumChemistryA student finds that the apparent molar mass of a salt is less than its true molar mass. Which conclusion can safely be drawn?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 9EasyChemistryA solute forms tetramers. If the degree of association is 50%, what is the value of i?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 13MediumChemistryA solute has i = 3.4 and is an electrolyte of type XY₄. What is its degree of dissociation?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 13MediumChemistryThe relative lowering of vapour pressure of a non-volatile solute is lower than expected. Which conclusion is most correct?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 9EasyChemistryAn AB₂ salt has i = 2.2. What is its degree of dissociation?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 12Medium