Questions About Solutions
Multiple-Choice Questions – Solutions
1. What is a solution?
A) A pure substance
B) A heterogeneous mixture
C) A homogeneous mixture of two or more substances
D) A compound
E) A chemical element
2. In a saltwater solution, the salt is the:
A) Solvent
B) Colloid
C) Solute
D) Suspension
E) Precipitate
3. Which of the following is not a characteristic of a solution?
A) Particles do not settle
B) Homogeneous throughout
C) Can be filtered easily
D) Particles are very small
E) Appears uniform
4. Which is the most common solvent in everyday life?
A) Ethanol
B) Acetone
C) Benzene
D) Water
E) Ammonia
5. What is the solute in carbonated water?
A) Water
B) Carbon dioxide
C) Sugar
D) Nitrogen
E) Oxygen
6. Which of the following is not a type of solution?
A) Gas in gas
B) Liquid in liquid
C) Solid in gas
D) Solid in solid
E) Gas in solid
7. Which of the following is an example of a solid solution?
A) Seawater
B) Air
C) Steel
D) Soda
E) Milk
8. What term describes how much solute can dissolve in a solvent at a specific temperature?
A) Concentration
B) Solubility
C) Molarity
D) Molality
E) Dilution
9. What happens to most solid solutes as temperature increases?
A) Solubility decreases
B) Solubility remains the same
C) Solubility increases
D) Solubility becomes zero
E) They evaporate
10. A solution that contains the maximum amount of solute at a given temperature is:
A) Dilute
B) Unsaturated
C) Supersaturated
D) Saturated
E) Concentrated
11. What happens in a supersaturated solution if more solute is added?
A) It evaporates
B) The solution boils
C) Crystals form
D) The solute dissolves
E) Nothing happens
12. Which of the following is a gaseous solution?
A) Steel
B) Sugar water
C) Vinegar
D) Air
E) Oil
13. Which method will not increase the rate at which a solute dissolves in a solvent?
A) Stirring
B) Heating
C) Crushing the solute
D) Using a smaller container
E) Increasing surface area
14. What is a concentrated solution?
A) A solution with no solute
B) A solution that is saturated
C) A solution with a large amount of solute
D) A mixture of two solids
E) A solution with particles visible to the eye
15. Which of the following best describes a dilute solution?
A) Contains mostly solute
B) Contains a small amount of solute
C) Cannot dissolve more solute
D) Has undergone filtration
E) Is a solid at room temperature
16. What type of solution is vinegar?
A) Solid in solid
B) Gas in gas
C) Liquid in liquid
D) Solid in gas
E) Gas in liquid
17. What determines whether a substance will dissolve in a given solvent?
A) Particle size
B) Color
C) Density
D) “Like dissolves like” principle
E) Electrical conductivity
18. In which of the following are electrolytes typically found?
A) Distilled water
B) Sugar solution
C) Saltwater
D) Alcohol
E) Olive oil
19. What unit is often used to express solution concentration?
A) Grams
B) Liters
C) Moles
D) Molarity (mol/L)
E) Celsius
20. A solution that can still dissolve more solute is called:
A) Saturated
B) Supersaturated
C) Dilute
D) Concentrated
E) Unsaturated
Answers with Explanations
1. C – A solution is a homogeneous mixture of two or more substances.
2. C – The solute is the substance being dissolved, in this case, salt.
3. C – Solutions cannot be filtered easily, because the particles are too small.
4. D – Water is the most universal and common solvent.
5. B – Carbon dioxide is the gas dissolved in water in carbonated drinks.
6. C – Solid in gas is not a typical solution; it is more like a suspension.
7. C – Steel is a solid solution of carbon in iron.
8. B – Solubility is the maximum amount of solute that can dissolve in a solvent.
9. C – Increasing temperature generally increases solubility for solids in liquids.
10. D – A saturated solution holds the maximum solute at a given temperature.
11. C – Adding more solute to a supersaturated solution usually causes crystallization.
12. D – Air is a gaseous solution (mainly nitrogen with oxygen and others mixed in).
13. D – Using a smaller container won’t help dissolve solute faster.
14. C – A concentrated solution contains a large amount of solute.
15. B – A dilute solution has little solute compared to solvent.
16. C – Vinegar is acetic acid dissolved in water, a liquid-liquid solution.
17. D – The phrase "like dissolves like" means polar solutes dissolve in polar solvents, and nonpolar in nonpolar.
18. C – Saltwater conducts electricity because salt dissociates into ions (electrolytes).
19. D – Molarity is the standard unit: mol of solute per liter of solution.
20. E – An unsaturated solution can still dissolve more solute.
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