Unit 6: Solutions
- What happens to the freezing point of a solution when a non-volatile solute is added?
- A) Freezing point increases
- B) Freezing point decreases
- C) Freezing point remains the same
- D) Freezing point fluctuates
- Answer: B) Freezing point decreases
- Which formula is used to calculate the molarity of a solution?
- A) moles of solute / liters of solution
- B) moles of solute / kilograms of solvent
- C) grams of solute / liters of solution
- D) moles of solute / moles of solvent
- Answer: A) moles of solute / liters of solution
- What term describes a solution where the solute is present in the smallest amount compared to the solvent?
- A) Saturated
- B) Concentrated
- C) Dilute
- D) Supersaturated
- Answer: C) Dilute
- What is the primary factor that determines the rate of dissolution of a solute?
- A) The color of the solute
- B) The size of the solute particles
- C) The density of the solute
- D) The temperature of the solvent
- Answer: B) The size of the solute particles
- In which solution does the solute dissolve completely without settling out?
- A) Suspension
- B) Colloid
- C) Solution
- D) Emulsion
- Answer: C) Solution
- What happens to the vapor pressure of a solution when more solute is added?
- A) It increases
- B) It decreases
- C) It remains the same
- D) It fluctuates
- Answer: B) It decreases
- Which of the following describes a solution where the solute is present in a very large amount compared to the solvent?
- A) Saturated solution
- B) Unsaturated solution
- C) Supersaturated solution
- D) Dilute solution
- Answer: C) Supersaturated solution
- What effect does adding a solute to a solvent have on the boiling point of the solution compared to the pure solvent?
- A) It lowers the boiling point
- B) It raises the boiling point
- C) It does not affect the boiling point
- D) It has an unpredictable effect
- Answer: B) It raises the boiling point
- What is the term for a solution in which the solute concentration is equal to the solute’s solubility?
- A) Unsaturated solution
- B) Saturated solution
- C) Supersaturated solution
- D) Dilute solution
- Answer: B) Saturated solution
- What does Henry’s Law state about the solubility of gases?
- A) The solubility of a gas is directly proportional to its partial pressure above the solution.
- B) The solubility of a gas is inversely proportional to its partial pressure above the solution.
- C) The solubility of a gas is independent of its partial pressure.
- D) The solubility of a gas increases with temperature.
- Answer: A) The solubility of a gas is directly proportional to its partial pressure above the solution.
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