Unit 6: Solutions

  1. Which of the following statements is true about colligative properties?
    • A) They depend on the type of solute.
    • B) They depend on the concentration of solute particles.
    • C) They are unaffected by temperature.
    • D) They are the same for all solutions.
    • Answer: B) They depend on the concentration of solute particles.
  2. Which property is not affected by the presence of a non-volatile solute in a solution?
    • A) Vapor pressure
    • B) Freezing point
    • C) Boiling point
    • D) Density
    • Answer: D) Density
  3. In a solution, what happens to the freezing point when a solute is added?
    • A) It increases
    • B) It decreases
    • C) It remains constant
    • D) It fluctuates
    • Answer: B) It decreases
  4. What is the relationship between boiling point elevation and the concentration of a solute?
    • A) Directly proportional
    • B) Inversely proportional
    • C) No relationship
    • D) Fluctuating
    • Answer: A) Directly proportional
  5. Which of the following is not a factor affecting solubility?
    • A) Temperature
    • B) Pressure (for solids)
    • C) Surface area
    • D) Density of the solute
    • Answer: D) Density of the solute
  6. Which type of solution will have the highest freezing point depression?
    • A) 0.1 M NaCl
    • B) 0.1 M KCl
    • C) 0.1 M Glucose
    • D) 0.1 M Na2SO4
    • Answer: D) 0.1 M Na2SO4
  7. What is the effect of temperature on the solubility of gases in liquids?
    • A) Solubility increases
    • B) Solubility decreases
    • C) Solubility remains constant
    • D) Solubility fluctuates
    • Answer: B) Solubility decreases
  8. The ability of a solution to conduct electricity is related to:
    • A) The concentration of non-electrolytes
    • B) The presence of volatile compounds
    • C) The concentration of electrolytes
    • D) The temperature of the solution
    • Answer: C) The concentration of electrolytes
  9. Which solution is most likely to be a good conductor of electricity?
    • A) 0.1 M NaCl
    • B) 0.1 M Sugar
    • C) 0.1 M Urea
    • D) 0.1 M Alcohol
    • Answer: A) 0.1 M NaCl
  10. The term “molar fraction” refers to:
    • A) The ratio of the moles of solute to the moles of solution
    • B) The ratio of the moles of solute to the moles of solvent
    • C) The ratio of the moles of solute to the moles of solute and solvent
    • D) The ratio of the volume of solute to the volume of solution
    • Answer: C) The ratio of the moles of solute to the moles of solute and solvent

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