Solutions Mock Tests

The vapour pressure of pure benzene at a certain temperature is 0.850 bar. When 0.5 g of a non-volatile solute (molar mass = 50 g mol⁻¹) is added to 39.0 g of benzene, the vapour pressure decreases to 0.845 bar. The mole fraction of the solvent is:

K₄[Fe(CN)₆] dissociates in water as K₄[Fe(CN)₆] → 4K⁺ + [Fe(CN)₆]⁴⁻. The van t Hoff factor (i) for a completely dissociated solution is:

What is the molality of a 2.0 M solution of NaCl with density 1.08 g/mL? (Molar mass NaCl = 58.5 g/mol)___SEQ___36

The depression in freezing point of a 0.01 m aqueous solution of Na2SO4 is: (Kf = 1.86 K kg/mol, van t Hoff factor i = 1.74)

The molal elevation constant (Kb) for water is 0.51 K kg mol⁻¹. An aqueous solution containing 1.8 g of glucose (molar mass = 180 g mol⁻¹) in 100 g of water will have its boiling point elevated by:

The freezing point depression of a 0.1 m solution of NaCl is observed to be -0.36 K. The van't Hoff factor for NaCl in this solution is: (Kf for water = 1.80 K·kg/mol)

The molality of a solution containing 18 g of glucose (C₆H₁₂O₆, molar mass = 180 g/mol) in 500 g of water is:

Which of the following colligative property is most accurately measured by osmometry?