Chapter 11 Multiple Choice Questions

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. When some solutes are added to some solvents, the viscosity of the resultant solution is found to be greater than that of the original solvent. However, 'raising of viscosity' is not a colligative property. Why is this?

The viscosity of the resultant solution depends on the amount of solute added. correct incorrect

The viscosity of the resultant solution depends on the amount of pure liquid. correct incorrect

The viscosity of the resultant solution depends on the nature of the solute added. correct incorrect

The viscosity of the resultant solution depends on the nature of the pure liquid. correct incorrect

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. At 75 ^oC, the vapour pressure of pure water is 39 kPa. Which one of the following is the most likely vapour pressure for a 1.5 M solution of sucrose (aq) at the same temperature?

37 kPa correct incorrect

39 kPa correct incorrect

0 kPa correct incorrect

41 kPa correct incorrect

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. Which of the four colligative properties arises in systems where there is an equilibrium between a liquid solution phase and a second liquid phase?

Lowering of vapour pressure correct incorrect

Lowering of melting point correct incorrect

Raising of boiling point correct incorrect

Osmotic pressure correct incorrect

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. Which of the following is the best description of a semipermeable membrane in the context of osmosis?

A membrane that allows neither solute nor solvent particles to pass through it. correct incorrect

A membrane that allows solute particles, but not solvent particles, to pass through it. correct incorrect

A membrane that allows solvent particles, but not solute particles, to pass through it. correct incorrect

A membrane that allows both solute and solvent particles to pass through it. correct incorrect

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. State the van't Hoff factor (i) for a dilute aqueous solution of the strong electrolyte barium hydroxide, Ba(OH)₂

0 correct incorrect

1 correct incorrect

2 correct incorrect

3 correct incorrect

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. The van't Hoff equation may be written as P = 1000 i [S] RT, where all terms have their usual meanings. Calculate the osmotic pressure of a 0.2 M solution of NaCl at 25 ^oC given R =8.314 J K^-1 mol^-1.

990 kPa correct incorrect

500 kPa correct incorrect

83 kPa correct incorrect

42 kPa correct incorrect

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. A cell is bathed is a solution that has a greater osmolarity than that of the cytosol. This solution is best described as which one of the following?

Isotonic correct incorrect

Hypertonic correct incorrect

Hypotonic correct incorrect

None of the above correct incorrect

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. What is the typical osmolarity of physiological fluids?

300 Mosmol L^-1 correct incorrect

0.3 mosmol L^-1 correct incorrect

300 osmol L^-1 correct incorrect

0.3 osmol L^-1 correct incorrect

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. Which one of the following is not an essential component of an osmotic pump drug delivery tablet?

Contain an active pharmaceutical ingredient (API) correct incorrect

Contain a single chamber correct incorrect

Coated with a semipermeable membrane correct incorrect

Have a orifice in the tablet coating correct incorrect

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. For ideal systems, the reduction in the chemical potential of solvent molecules upon the addition of solute depends only on which one of the following?

The melting point of the solute. correct incorrect

The solubility of the solute. correct incorrect

The number of solute particles. correct incorrect

The boiling point of the solute. correct incorrect