Questions on Saturated and Unsaturated Solutions
Multiple-Choice Questions – Saturated and Unsaturated Solutions
1. What is a saturated solution?
A) A solution with no solute
B) A solution that can still dissolve more solute
C) A solution with undissolved particles
D) A solution holding the maximum amount of solute at a given temperature
E) A solution with only one component
2. What happens if more solute is added to a saturated solution?
A) It dissolves easily
B) It increases the volume
C) It evaporates
D) It crystallizes or settles at the bottom
E) It changes the color of the solvent
3. What is an unsaturated solution?
A) A solution that cannot dissolve any more solute
B) A solution with more solute than solvent
C) A solution that contains less solute than it can dissolve
D) A supersaturated solution
E) A heterogeneous mixture
4. If a solution still dissolves more solute, it is:
A) Saturated
B) Supersaturated
C) Colloidal
D) Dilute
E) Unsaturated
5. What best describes a supersaturated solution?
A) A solution with zero solute
B) A solution that is at equilibrium
C) A solution with more dissolved solute than normally possible
D) A solid mixture
E) A gaseous solution
6. Which factor increases solubility in most solid-liquid solutions?
A) Decreasing temperature
B) Stirring slowly
C) Lowering pressure
D) Increasing temperature
E) Removing the solvent
7. Which of the following is a sign of saturation in a solution?
A) All solute is dissolved
B) The solvent is colored
C) The solution is boiling
D) Undissolved solute is visible
E) The solution is very dilute
8. Which solution holds less than the maximum amount of solute?
A) Supersaturated
B) Saturated
C) Homogeneous
D) Unsaturated
E) Concentrated
9. When no more solute can be dissolved, the solution is:
A) Diluted
B) Supersaturated
C) Saturated
D) Miscible
E) Polar
10. How can a supersaturated solution be formed?
A) Cooling a saturated solution carefully
B) Adding more solvent to a saturated solution
C) Boiling an unsaturated solution
D) Filtering a saturated solution
E) Shaking a solvent rapidly
11. A saturated solution at a given temperature becomes unsaturated when:
A) Pressure is increased
B) More solute is added
C) The solution is heated
D) The solute is removed
E) It is frozen
12. Which of the following is always true about an unsaturated solution?
A) It contains more solute than solvent
B) It can dissolve more solute
C) It is unstable
D) It will always become supersaturated
E) It is at equilibrium
13. Which factor does not affect whether a solution is saturated?
A) Temperature
B) Type of solute
C) Volume of container
D) Amount of solvent
E) Amount of solute
14. What happens when a saturated solution is cooled and becomes supersaturated?
A) The solute dissolves faster
B) The solution separates
C) Excess solute may crystallize
D) All solute evaporates
E) Nothing changes
15. Which of these is most likely to form a supersaturated solution?
A) Cold water with sugar
B) Room-temperature water with salt
C) Hot water slowly cooled with extra solute
D) Water and oil mixture
E) Any saturated solution
16. A solution that looks clear but forms crystals when disturbed is likely:
A) Saturated
B) Dilute
C) Supersaturated
D) Unsaturated
E) A colloid
17. Which statement about saturated solutions is correct?
A) They contain no solute
B) They are always visible as solids
C) They hold more solute than possible
D) They are at equilibrium between dissolved and undissolved solute
E) They are always unstable
18. If no solute is visible and more solute still dissolves, the solution is:
A) Supersaturated
B) Saturated
C) Unsaturated
D) Concentrated
E) Colloidal
19. Which of the following might happen when a seed crystal is added to a supersaturated solution?
A) The solute disappears
B) The temperature rises
C) Crystals form quickly
D) The solution becomes unsaturated
E) Nothing changes
20. Which tool can help determine whether a solution is saturated?
A) pH meter
B) Thermometer
C) Conductivity tester
D) Adding more solute and observing
E) Graduated cylinder
Answer Key with Explanations
1. D – A saturated solution contains the maximum solute that can dissolve at a given temperature.
2. D – Extra solute in a saturated solution will settle at the bottom or crystallize.
3. C – An unsaturated solution can still dissolve more solute.
4. E – If more solute can dissolve, the solution is unsaturated.
5. C – A supersaturated solution holds more solute than normal, under special conditions.
6. D – For most solids, raising the temperature increases solubility.
7. D – Undissolved solute indicates that the solution is saturated.
8. D – An unsaturated solution holds less solute than it can.
9. C – A saturated solution cannot dissolve more solute under the same conditions.
10. A – Supersaturated solutions are made by cooling saturated solutions slowly without disturbing them.
11. C – Heating increases solubility, making a saturated solution unsaturated again.
12. B – Unsaturated solutions can still accept and dissolve more solute.
13. C – The volume of the container has no direct effect on saturation unless it affects solvent amount.
14. C – Cooling may lead to excess solute crystallizing out.
15. C – Supersaturation requires dissolving solute at high temperature, then cooling slowly.
16. C – A supersaturated solution may crystallize if disturbed.
17. D – Saturated solutions are at dynamic equilibrium between dissolved and undissolved solute.
18. C – If solute still dissolves, the solution is unsaturated.
19. C – A seed crystal triggers rapid crystallization in a supersaturated solution.
20. D – Adding more solute is a practical test: if it doesn’t dissolve, the solution is saturated.
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