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Chapter 01 Solutions

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

ChemistryThe normal molar mass of NaCl is 58.5 g mol⁻¹. If the van’t Hoff factor is 1.8 in solution, what is the approximate observed molar mass?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 18Medium ChemistryA solution has an osmotic pressure of 2.46 atm at 300 K and a concentration of 0.1 M. Taking R = 0.082 L atm K⁻¹ mol⁻¹, what is the van’t Hoff factor?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 18Medium ChemistryIf 0.01 mol of a substance is present in 100 mL of solution, what is its molarity?Class 12Chapter 01: Solutions2: Concentration MetricsLevel 18Easy ChemistryIn the osmotic-pressure method, if the volume of a solution is halved while the amount of solute and temperature remain unchanged, what happens to the osmotic pressure?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 18Medium ChemistryWhen 1 g of a substance is dissolved in 100 g of a solvent, the elevation in boiling point is 0.052 K. If Kb = 0.52 K kg mol⁻¹, what is the molar mass of the substance?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 18Medium ChemistryWhen 3 g of a nonelectrolyte is dissolved in 500 g of water, ΔTf = 0.186 K. If Kf = 1.86 K kg mol⁻¹, what is the molar mass?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 18Medium ChemistryA solution contains 1.8 g of solute dissolved in 200 g of water. If its molality is 0.05 m, what is the molar mass of the solute?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 18Medium ChemistryIf a salt gives three ions on complete dissociation, how will the observed molar mass obtained from colligative properties compare with its normal molar mass?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 18Medium ChemistryThe normal molar mass of an organic acid is 120 g mol⁻¹. In benzene, its observed molar mass is 240 g mol⁻¹. Which reason explains this result?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 18Medium ChemistryThe normal molar mass of a solute is 60 g mol⁻¹, but its observed molar mass from colligative properties is 30 g mol⁻¹. What is the van’t Hoff factor?Class 12Chapter 01: Solutions7: Abnormal Molecular MassLevel 18Medium ChemistryA 0.6 g sample of a substance produces an osmotic pressure of 0.246 atm in 0.2 L of solution at 300 K. If R = 0.082 L atm K⁻¹ mol⁻¹, what is the molar mass?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 18Medium ChemistryWhen 2 g of a nonelectrolyte is dissolved in 200 g of solvent, the elevation in boiling point is 0.052 K. If Kb = 0.52 K kg mol⁻¹, what is the molar mass?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 18Medium ChemistryWhen 1.5 g of a nonelectrolyte is dissolved in 100 g of water, the depression in freezing point is 0.279 K. If Kf = 1.86 K kg mol⁻¹, what is the molar mass of the solute?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 18Medium ChemistryWhy can a small error in the temperature difference cause a large error in molar mass determination?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 18Medium ChemistryWhile calculating molar mass by the osmotic pressure method, if the volume is given as 250 mL, in what form should it be used in the formula?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 18Easy ChemistryThe molar mass obtained from freezing-point depression is lower than expected. If the solute is an electrolyte, which reason is suitable?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 17Medium ChemistryIf two non-dissociating solutes have equal masses and the first has a lower molar mass, which one will show the greater colligative effect?Class 12Chapter 01: Solutions5: Colligative PropertiesLevel 17Medium ChemistryIf the mole fraction of solute is 0.1 and the total number of moles is 2, how many moles of solute are present?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 17Easy ChemistryIf the relative lowering of vapour pressure of a solution is 0.05, what is the mole fraction of solute in an ideal dilute solution?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 17Easy ChemistryIn the osmotic-pressure method, 1.5 g of solute is present in 500 mL of solution. If T = 300 K, π = 0.738 atm, and R = 0.082 L atm K⁻¹ mol⁻¹, what is the molar mass?Class 12Chapter 01: Solutions6: Molar Mass DeterminationLevel 17Medium