Unit 6: Solutions
- The freezing point depression and boiling point elevation are both:
- A) Directly proportional to the concentration of solute particles
- B) Inversely proportional to the concentration of solute particles
- C) Independent of the concentration of solute particles
- D) Not affected by the concentration of solute particles
- Answer: A) Directly proportional to the concentration of solute particles
- What happens to the vapor pressure of a solution as the concentration of solute increases?
- A) Vapor pressure increases
- B) Vapor pressure decreases
- C) Vapor pressure remains the same
- D) Vapor pressure fluctuates
- Answer: B) Vapor pressure decreases
- Which formula is used to calculate the freezing point depression of a solution?
- A) ΔT_f = K_f × m
- B) ΔT_b = K_b × m
- C) π = i × C × R × T
- D) ΔP = P_0 × X_solute
- Answer: A) ΔT_f = K_f × m
- What is the effect of temperature on the solubility of most solids in liquids?
- A) Solubility decreases
- B) Solubility remains constant
- C) Solubility increases
- D) Solubility fluctuates
- Answer: C) Solubility increases
- Which solution will have the highest vapor pressure?
- A) 0.1 M NaCl
- B) 0.1 M KCl
- C) 0.1 M Glucose
- D) 0.1 M Na2SO4
- Answer: C) 0.1 M Glucose
- Which property is most affected by the number of solute particles in a solution?
- A) Vapor pressure
- B) Density
- C) Color
- D) Odor
- Answer: A) Vapor pressure
- Which solution would have 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
- What is the main cause of the lowering of vapor pressure in a solution?
- A) Formation of gas bubbles
- B) Increase in temperature
- C) Presence of solute particles blocking solvent molecules from escaping
- D) Decrease in pressure
- Answer: C) Presence of solute particles blocking solvent molecules from escaping
- Which of the following equations is used to calculate the freezing point depression of a solution?
- A) ΔT_f = K_f × m
- B) ΔT_b = K_b × m
- C) π = i × C × R × T
- D) P = P_0 × X_solvent
- Answer: A) ΔT_f = K_f × m
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