Q1:
The image below shows three manometers, each containing a sample of ethanoic acid. For which manometer is the temperature of the ethanoic acid the highest?
- A A
- B B
- C C
Q2:
The given graph shows vapor pressure against temperature for three solutions of and pure water. Which solution has the lowest concentration?
- A Solution C
- B Solution B
- C Solution A
Q3:
Which of the following factors does not affect the vapor pressure of a liquid?
- A Volume of the liquid
- B Temperature
- C Intermolecular forces
- D Concentration of solutions
Q4:
Which of the following solutions would you expect to have the lowest vapor pressure? Assume all solutions are at the same temperature.
- A 0.1 M solution of urea
- B 0.1 M solution of
- C 0.1 M solution of
- D 0.1 M solution of
- E 0.1 M solution of
Q5:
Which of the following liquids would have the greatest vapor pressure at ?
-
A
-
B
-
C
-
D
-
E
Q6:
Which of the following substances would you expect to lower the freezing point of water the most if 1 mol of the substance was present in 1 000 g of water?
- A
- B
- C
- D
- E
Q7:
Given the information in the table, which organic compound has the least vapor pressure at ?
| Organic Compound | Propanal | Ethanoic acid | Methyl methanoate | Methylpropane | Propan-1-ol |
|---|---|---|---|---|---|
| Boiling Point () | 48.8 | 117.9 | 31.5 | 97.0 |
- A Methylpropane
- B Propanal
- C Ethanoic acid
- D Methyl methanoate
- E Propan-1-ol
Q8:
If two solutions of magnesium chloride and sodium chloride have the same concentration, which one of the following statements is considered correct?
- A The boiling point of the magnesium chloride solution is equal to the boiling point of the sodium chloride solution.
- B The boiling point of the magnesium chloride solution is higher than the boiling point of the sodium chloride solution.
- C The boiling point of the magnesium chloride solution is lower than the boiling point of the sodium chloride solution.
- D The freezing point of the sodium chloride solution is lower than the freezing point of the magnesium chloride solution.
Q9:
In a closed system, a constant vapor pressure results from the formation of a dynamic equilibrium between the vapor and the liquid. At this equilibrium, which two opposing processes are occurring at the same rate?
- A The diffusion of the liquid and the effusion of the vapor
- B The evaporation of the liquid and the diffusion of the vapor
- C The evaporation of the liquid and the condensation of the vapor
- D The self-ionization of water and the condensation of the vapor
- E The breaking of chemical bonds and the formation of chemical bonds
Q10:
A chemist is given three different liquids and wants to determine which one is the most volatile. The chemist places an equal volume of each liquid into a manometer and ensures the temperature of all three liquids is the same. According to the image below, which liquid is the most volatile?
- A Propanol
- B Ethylene glycol
- C Diethyl ether
Q11:
Colligative properties of any solution depend only on the concentration of solute particles per unit volume of the solvent. Which of the following is not considered an example of colligative properties?
- A Increasing the boiling point of the solution compared to the pure solvent
- B Decreasing the vapour pressure of the solution compared to the pure solvent
- C Decreasing the freezing point of the solution compared to the pure solvent
- D Increasing the viscosity of the solution compared to the pure solvent
Q12:
The boiling point of is . If it is dissolved in water to prepare a solution, the boiling point of the solution would be .
- A
- B
- C
- D
Q13:
3 spoons of sugar were added to a cup of water to form a solution. Which one of the following is considered a false statement?
- A The vapour pressure of the solution is higher than that of pure water.
- B The vapour pressure of the solution is lower than that of pure water.
- C The boiling point of the solution is higher than that of pure water.
- D When the amount of sugar is increased, the boiling point of the solution increases.
Q14:
North European countries are suffering from the formation of ice on their pavements during winter. Deicers work by lowering the freezing point of water. Which of the following solutions, which have the same concentration, can help more in preventing the formation of ice?
- A
- B
- C
- D
Q15:
Which one of the following compounds has the lowest vapour pressure when 2 mol of it is dissolved in 1 kg of water?
- A
- B
- C
- D
Q16:
Which of the following statements is not correct?
- A The freezing point of the solution is higher than that of the pure solvent.
- B The boiling point of the pure solvent is lower than that of the solution.
- C The freezing point of the solution is lower than that of the pure solvent.
- D The vapour pressure of the pure solvent is higher than that of the solution.
Q17:
A student dissolves 20 g of a non-electrolyte substance with molar mass 80 g/mol in 500 g of water. Then, he observes that the freezing point of the solution decreases by .
- A
- B
- C
- D
Q18:
Among the following compounds, which one has the lowest freezing point after being dissolved in water, assuming that all of them form equally concentrated solutions?
- A
- B
- C
- D
Q19:
If the concentrations of all of the following solutions are equal, which of them has the highest freezing point?
- A solution
- B solution
- C solution
- D solution
Q20:
If an amount of pure ethanol is placed in a vessel at normal atmospheric pressure and heated until boiling, the measured boiling temperature is expected to be the natural boiling point of ethanol.
- A greater than
- B equal to
- C less than
- D less than or equal to
Q21:
What is the freezing point of a solution consisting of 426 g of dissolved in 1 L of water? [,,,]
- A
- B
- C
- D
Q22:
Which of the following is not true about the boiling point of a solution?
- A The boiling point of an aqueous solution of is nearly the same as the boiling point of an aqueous solution of .
- B The boiling point of pure is higher than the boiling point of an aqueous solution of .
- C The boiling point can be used as an indicator of the purity of the solvent.
- D The boiling point of an aqueous solution of is higher than the boiling point of an aqueous solution of .
Q23:
If the following solutions of equal molar concentrations are put in the freezer, which of them will be the last to freeze?
- A Table sugar solution
- B Ferric chloride solution
- C Table salt solution
- D Silver nitrate solution
Q24:
What is the boiling point of a molal solution of calcium carbonate when 1 mole of its ions is dissolved in 1 L of water, causing the boiling point of the water to change by ?
- A
- B
- C
- D
Q25:
Assuming that two solutions of sodium chloride and propanol have the same concentration, which of the following statements is true about their boiling points?
- A The boiling point of sodium chloride solution is equal to that of propanol solution.
- B The boiling point of sodium chloride solution is greater than or equal to that of propanol solution.
- C The boiling point of sodium chloride solution is greater than that of propanol solution.
- D The boiling point of sodium chloride solution is less than that of propanol solution.
