Solutions Mock Tests

What is the coordination number of each ion in a sodium chloride (NaCl) crystal structure?

Two liquids A and B form an ideal solution. At a certain temperature, the vapour pressure of pure A is 200 mm Hg and that of pure B is 75 mm Hg. What is the vapour pressure of a solution containing a mole fraction of 0.50 of A?

The molality of a solution containing 9 g of urea (NH2CONH2, molar mass = 60 g/mol) in 250 g of water is:

At 298 K, the Henry's Law constant for CO₂ in water is 1.67 × 10⁸ Pa. What is the mass of CO₂ dissolved in 1 litre of water when the pressure of CO₂ is 2.5 × 10⁴ Pa at 298 K? (Molar mass of CO₂ = 44 g mol⁻¹)

At 300 K, a solution has an osmotic pressure of 2.46 bar. If the same solution is heated to 350 K keeping volume constant, the new osmotic pressure is: (assume ideal behaviour)

0.6 g of acetic acid (CH₃COOH, molar mass = 60 g/mol) is dissolved in 200 g of benzene. The freezing point of the solution is lowered by 0.15 °C compared to pure benzene. If acetic acid dimerises in benzene, the percentage dimerisation is: (Kf for benzene = 5 K·kg/mol)

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

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)