The freezing point of a 0.05 molal solution of a non- electrolyte in water is

• -0.093° C

• 1.86°C

• 0.93° C

• 0.093°C

Solutions A, B, C and D are respectively 0.1 M glucose, 0.05 M NaCl, 0.05 M BaCl₂ and 0.1 M AlCl₃. Which one of the following pairs is isotonic?

• A and B

• B and C

• A and D

• A and C

Copper is a divalent metal. The value of its electrochemical equivalent is 3.29 × 10^-4 g. Its atomic mass is

• 31.74 g

• 63.5 g

• 126.9 g

• 15.87 g

The vapour pressure of benzene at a certain temperature is 640 mm of Hg. A non-volatile and non-electrolyte solid weighing 2.175 g is added to 39.08 g of benzene. If the vapour pressure of the solution is 600 mm of Hg, what is the molecular weight of solid substance ?

• 49.50

• 59.60

• 69.60

• 79.82

Which of the following solutions will have highest boiling point ?

• 0.1 M FeCl₃

• 0.1 M BaCl₂

• 0.1 M NaCl

• 0.1 M urea (NH₂CONH₂)

Maximum depression in freezing point is caused by

• potassium chloride

• sodium sulphate

• magnesium sulphate

• magnesium carbonate

Which of the following is not a colligative property?

• Elevation in boiling point

• Lowering of vapour pressure

• Osmotic pressure

• Freezing point

34.2 g of cane sugar is dissolved in 180 g of water. The relative lowering of vapour pressure will be

• 0.0099

• 1.1597

• 0.840

• 0.9901

According to Hess's law, the heat of reaction depends upon

• initial condition of reactants

• initial and final conditions of reactants

• intermediate path of the reaction

• end conditions of reactants

340.

Ratio of loss in solvent to gain in CaCl₂ tube is

• $\frac{\mathrm{p}°}{\mathrm{p}}$

• $\frac{\mathrm{p}}{\mathrm{p}°}$

• $\frac{\mathrm{p}° - \mathrm{p}}{\mathrm{p}°}$

• $\frac{\mathrm{p} - \mathrm{p}°}{\mathrm{p}}$