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Class 12 Chemistry के इस tag से जुड़े questions। हर question के साथ chapter, topic, level और difficulty दी गई है।

ChemistryThe observed molar mass of a substance is 200 g mol⁻¹. If 25% of its molecules form dimers, what is the normal molar mass?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 18Hard ChemistryA salt of type A₂B is 40% dissociated. Its normal molar mass is 150 g mol⁻¹. What will be its observed molar mass?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 18Hard ChemistryA polymer solution contains 0.2 g polymer in 200 mL solution. At 300 K, its osmotic pressure is 0.0205 atm. If R = 0.082 L atm K⁻¹ mol⁻¹, what is the molar mass of the polymer?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 18Medium ChemistryA solution contains 1.5 g solute dissolved in 0.25 kg solvent. If its molality is 0.06 m, what is the molar mass of the solute?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 18Medium ChemistryIn the vapour-pressure-lowering method, 1.8 g of a solute is dissolved in 9.0 g water. The relative lowering of vapour pressure is 0.10. If the molar mass of water is 18 g mol⁻¹, what is the approximate molar mass of the solute?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 18Medium ChemistryA 1.0 g sample of an AB-type salt dissolved in 100 g water gives ΔT_f = 0.372 K. If K_f = 1.86 K kg mol⁻¹ and the normal molar mass is 100 g mol⁻¹, what is the degree of dissociation?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 18Hard ChemistryA 0.5 g solute dissolved in 100 g water gives ΔT_f = 0.093 K. If K_f = 1.86 K kg mol⁻¹ and the solute undergoes 50% dimer association, what is its normal molar mass?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 18Hard ChemistryA 250 mL solution is prepared using 0.25 g of a polymer. Its osmotic pressure at 300 K is 0.041 atm. If R = 0.082 L atm K−1 mol−1, what is the molar mass of the polymer?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 18Hard ChemistryA 2.5 g solute dissolved in 125 g of solvent produces a boiling-point elevation of 0.26 K. If Kb = 0.52 K kg mol−1, what is the molar mass of the solute?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 18Hard ChemistryWhen 1.8 g of a nonelectrolyte is dissolved in 150 g of solvent, the depression in freezing point is 0.372 K. For the solvent, Kf = 1.86 K kg mol−1. What is the molar mass of the solute?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 18Hard ChemistryIf 60% of the molecules of a substance form trimers and its normal molar mass is 90 g mol−1, what will be the observed molar mass?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 18Hard ChemistryFor an AB-type electrolyte, the van’t Hoff factor is i = 1.5. If its normal molar mass is 80 g mol−1, what are the observed molar mass and degree of dissociation, respectively?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 18Hard ChemistryFor the same solute, 1.0 g dissolved in 100 g of solvent gives ΔTf = 0.186 K. If 2.0 g of the same solute is dissolved in 250 g of the same solvent, what will be the new value of ΔTf?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 18Medium ChemistryWhen 4.0 g of a substance is dissolved in 200 g of water, ΔTf = 0.372 K. If its normal molar mass is 100 g mol−1 and Kf = 1.86 K kg mol−1, what is the van’t Hoff factor i in the solution?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 18Hard ChemistryWhen 2.0 g of a nonelectrolyte is dissolved in 100 g of solvent, the boiling point of the solution is 373.104 K. The boiling point of the pure solvent is 373.000 K and Kb = 0.52 K kg mol−1. What is the molar mass of the solute?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 18Hard ChemistryWhen 1.2 g of a nonelectrolyte is dissolved in 100 g of solvent, the freezing point of the solution is 272.814 K. The freezing point of the pure solvent is 273.000 K and Kf = 1.86 K kg mol−1. What is the molar mass of the solute?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 18Hard ChemistryThe normal molar mass of an organic acid is 60 g mol⁻¹. In benzene, its observed molar mass is 96 g mol⁻¹. If association occurs only through dimerisation, what is the degree of association?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 18Hard ChemistryIn a solution, the observed molar mass of a solute is 72 g mol⁻¹ and its normal molar mass is 120 g mol⁻¹. For an AB-type solute, what is the degree of dissociation?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 18Hard ChemistryA salt of the type AB₂ is 75% dissociated. If its normal molar mass is 120 g mol⁻¹, what will be its observed molar mass?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 18Hard ChemistryA substance undergoes 40% dimer association. If its normal molar mass is 100 g mol⁻¹, what will be the approximate observed molar mass?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 18Hard