Unit 6: Solutions

  1. What is the effect of increasing pressure on the solubility of gases in liquids?
    • A) Solubility decreases
    • B) Solubility increases
    • C) Solubility remains the same
    • D) Solubility fluctuates
    • Answer: B) Solubility increases
  2. Which of the following is a characteristic of a colligative property?
    • A) It depends on the identity of the solute.
    • B) It depends on the concentration of solute particles.
    • C) It is independent of the solute concentration.
    • D) It changes with temperature only.
    • Answer: B) It depends on the concentration of solute particles.
  3. According to Raoult’s law, the vapor pressure of a solvent in an ideal solution is:
    • A) Directly proportional to the mole fraction of the solvent
    • B) Inversely proportional to the mole fraction of the solvent
    • C) Independent of the mole fraction of the solvent
    • D) Equal to the pressure of the solute
    • Answer: A) Directly proportional to the mole fraction of the solvent
  4. What is the van ‘t Hoff factor (i) for a solution of NaCl in water?
    • A) 1
    • B) 2
    • C) 3
    • D) 4
    • Answer: B) 2
  5. Which type of solution has the highest boiling point elevation?
    • 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
  6. The process where a solute is evenly distributed throughout a solvent is called:
    • A) Solvation
    • B) Precipitation
    • C) Filtration
    • D) Distillation
    • Answer: A) Solvation
  7. The enthalpy change associated with the dissolution of a solute in a solvent is called:
    • A) Enthalpy of fusion
    • B) Enthalpy of vaporization
    • C) Enthalpy of solution
    • D) Enthalpy of reaction
    • Answer: C) Enthalpy of solution
  8. Which formula is used to calculate the molality of a solution?
    • A) moles of solute / liters of solution
    • B) moles of solute / moles of solvent
    • C) moles of solute / kilograms of solvent
    • D) grams of solute / liters of solution
    • Answer: C) moles of solute / kilograms of solvent
  9. What does the term “isotonic” refer to in solution chemistry?
    • A) Solutions with equal concentrations of solute
    • B) Solutions with equal volumes
    • C) Solutions with equal temperatures
    • D) Solutions with equal solubility
    • Answer: A) Solutions with equal concentrations of solute
  10. Which of the following factors will decrease the solubility of a gas in a liquid?
    • A) Increasing temperature
    • B) Increasing pressure
    • C) Increasing the surface area of the liquid
    • D) Decreasing the temperature
    • Answer: A) Increasing temperature

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