Raoults Law

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Q. In a solution of volatile components A and B, if the vapor pressure of A is 80 mmHg and that of B is 20 mmHg, what is the total vapor pressure?
  • A. 100 mmHg
  • B. 80 mmHg
  • C. 60 mmHg
  • D. 20 mmHg
Q. In an ideal solution, the enthalpy of mixing is:
  • A. Positive
  • B. Negative
  • C. Zero
  • D. Varies with concentration
Q. What does Raoult's Law state about the vapor pressure of a solution?
  • A. It is directly proportional to the mole fraction of the solvent.
  • B. It is inversely proportional to the mole fraction of the solute.
  • C. It is equal to the vapor pressure of the solute.
  • D. It is independent of temperature.
Q. What happens to the vapor pressure of a solution as the concentration of a non-volatile solute increases?
  • A. It increases.
  • B. It decreases.
  • C. It remains constant.
  • D. It fluctuates.
Q. What happens to the vapor pressure of a solvent when a volatile solute is added?
  • A. It increases.
  • B. It decreases.
  • C. It remains the same.
  • D. It becomes zero.
Q. What is Raoult's Law primarily used to describe?
  • A. The behavior of ideal gases
  • B. The vapor pressure of solutions
  • C. The boiling point elevation
  • D. The freezing point depression
Q. What is Raoult's Law primarily used to determine?
  • A. Vapor pressure of a solution
  • B. Boiling point elevation
  • C. Freezing point depression
  • D. Molarity of a solution
Q. What is the effect of adding a non-volatile solute to a solvent on the vapor pressure of the solvent?
  • A. It increases the vapor pressure.
  • B. It decreases the vapor pressure.
  • C. It has no effect on the vapor pressure.
  • D. It doubles the vapor pressure.
Q. What is the effect of increasing temperature on the vapor pressure of a solution?
  • A. It decreases the vapor pressure.
  • B. It increases the vapor pressure.
  • C. It has no effect.
  • D. It causes the vapor pressure to become zero.
Q. What is the effect of increasing temperature on the vapor pressure of a solvent according to Raoult's Law?
  • A. It decreases the vapor pressure.
  • B. It increases the vapor pressure.
  • C. It has no effect.
  • D. It depends on the solute.
Q. What is the effect of temperature on Raoult's Law?
  • A. It has no effect.
  • B. It increases vapor pressure.
  • C. It decreases vapor pressure.
  • D. It only affects the solute.
Q. What is the effect of temperature on the vapor pressure of a solvent according to Raoult's Law?
  • A. Vapor pressure decreases with temperature
  • B. Vapor pressure increases with temperature
  • C. Vapor pressure remains constant with temperature
  • D. Vapor pressure is independent of the solvent
Q. What type of deviation from Raoult's Law is observed in solutions with strong solute-solvent interactions?
  • A. Positive deviation
  • B. Negative deviation
  • C. No deviation
  • D. Complete miscibility
Q. What type of solutions does Raoult's Law apply to most accurately?
  • A. Ideal solutions
  • B. Non-ideal solutions
  • C. Concentrated solutions
  • D. Dilute solutions
Q. What type of solutions does Raoult's Law apply to?
  • A. Ideal solutions only.
  • B. Non-ideal solutions only.
  • C. Both ideal and non-ideal solutions.
  • D. Concentrated solutions only.
Q. Which of the following factors does NOT affect the application of Raoult's Law?
  • A. Nature of the solute
  • B. Temperature
  • C. Mole fraction of the solvent
  • D. Pressure of the system
Q. Which of the following factors does NOT affect the vapor pressure of a solution according to Raoult's Law?
  • A. Nature of the solute
  • B. Temperature
  • C. Mole fraction of the solvent
  • D. Pressure of the system
Q. Which of the following is a consequence of Raoult's Law in a binary solution?
  • A. The total vapor pressure is the sum of the partial pressures.
  • B. The total vapor pressure is always lower than the vapor pressure of the pure solvent.
  • C. The mole fraction of the solute is always greater than that of the solvent.
  • D. The boiling point of the solution is always higher than that of the pure solvent.
Q. Which of the following is a correct application of Raoult's Law?
  • A. Calculating the boiling point elevation
  • B. Determining the freezing point depression
  • C. Finding the vapor pressure of a solution
  • D. Measuring the solubility of a gas in a liquid
Q. Which of the following is a limitation of Raoult's Law?
  • A. It applies to all solutions.
  • B. It is valid for ideal solutions only.
  • C. It does not consider temperature effects.
  • D. It is applicable to non-volatile solutes only.
Q. Which of the following is NOT a condition for Raoult's Law to be applicable?
  • A. The solution must be ideal.
  • B. The solute must be non-volatile.
  • C. The components must be miscible in all proportions.
  • D. The solution must be at high pressure.
Q. Which of the following is NOT a condition for Raoult's Law to hold true?
  • A. The solution must be ideal.
  • B. The solute must be volatile.
  • C. The solute and solvent must be miscible.
  • D. The temperature must be constant.
Q. Which of the following statements is true according to Raoult's Law?
  • A. The vapor pressure of a solution is always higher than that of the pure solvent.
  • B. The vapor pressure of a solution is lower than that of the pure solvent.
  • C. Raoult's Law applies only to ideal solutions.
  • D. The mole fraction of solute affects the vapor pressure of the solvent.
Q. Which of the following statements is true regarding ideal solutions?
  • A. They obey Raoult's Law at all concentrations.
  • B. They do not exhibit any deviation from Raoult's Law.
  • C. They have a constant boiling point.
  • D. They have a variable composition.
Q. Which of the following statements is true regarding non-ideal solutions?
  • A. They obey Raoult's Law perfectly.
  • B. They show positive or negative deviations from Raoult's Law.
  • C. Their vapor pressure is always higher than predicted by Raoult's Law.
  • D. They cannot be formed by mixing two volatile liquids.
Q. Which of the following statements is true regarding Raoult's Law?
  • A. It applies to all types of solutions.
  • B. It is only applicable to ideal solutions.
  • C. It can be used for any solute-solvent combination.
  • D. It is not applicable to volatile solutes.
Q. Which type of solution does Raoult's Law apply to most accurately?
  • A. Ideal solutions
  • B. Non-ideal solutions
  • C. Concentrated solutions
  • D. Dilute solutions
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