Questions About Liquid-Liquid Solutions
Multiple Choice Questions – Liquid-Liquid Solutions
1. Which of the following is an example of a liquid-liquid solution?
A) Sugar dissolved in water
B) Salt dissolved in oil
C) Alcohol mixed with water
D) Carbon dioxide in soda
E) Air
2. In a liquid-liquid solution, the solute is:
A) Always water
B) The liquid in greater volume
C) The liquid that dissolves the other
D) The liquid in smaller proportion
E) Always a nonpolar substance
3. Which term best describes two liquids that can dissolve in each other in all proportions?
A) Immiscible
B) Insoluble
C) Miscible
D) Colloidal
E) Heterogeneous
4. Which pair of liquids is immiscible?
A) Ethanol and water
B) Vinegar and water
C) Acetone and water
D) Oil and water
E) Alcohol and acetone
5. What type of intermolecular force is most responsible for the miscibility of water and ethanol?
A) Ionic bonding
B) Hydrogen bonding
C) London dispersion forces
D) Dipole-induced dipole
E) Metallic bonding
6. Which of the following can increase miscibility in some cases?
A) Lowering temperature
B) Stirring only
C) Increasing pressure
D) Increasing temperature
E) Adding a solid solute
7. When two liquids form a homogeneous mixture, the result is a:
A) Suspension
B) Heterogeneous solution
C) Colloid
D) Liquid-liquid solution
E) Solid solution
8. The term immiscible means:
A) Liquids completely dissolve
B) Liquids dissolve only under heat
C) Liquids do not mix into a uniform phase
D) Liquids react chemically
E) Liquids form crystals
9. In an oil and water mixture, what is observed?
A) One clear layer
B) Crystallization
C) Homogeneous blending
D) Two distinct layers
E) Formation of a gas
10. Which factor is least likely to affect miscibility between two liquids?
A) Polarity
B) Temperature
C) Volume ratio
D) Molecular structure
E) Hydrogen bonding capability
11. Which best describes a liquid-liquid solution at the molecular level?
A) Solute floats above the solvent
B) Solute particles are trapped in solvent’s lattice
C) Molecules of both liquids are uniformly distributed
D) A chemical reaction occurs
E) Only surface contact happens
12. Why are oil and water immiscible?
A) Water is nonpolar and oil is polar
B) They have similar densities
C) Oil is charged and water is neutral
D) Water is polar and oil is nonpolar
E) Oil evaporates first
13. Which of the following mixtures is miscible?
A) Oil and vinegar
B) Water and gasoline
C) Water and acetone
D) Water and mercury
E) Oil and honey
14. What causes layer formation in immiscible liquids?
A) High solubility
B) Density differences and non-interaction
C) Ionic bonding
D) Excessive stirring
E) Surface tension
15. In a vinegar-water solution, the solvent is:
A) Vinegar
B) Water
C) Acetic acid
D) Oil
E) Alcohol
16. What happens when ethanol and water are mixed?
A) Ethanol floats on top
B) Water evaporates
C) They react and form a gas
D) A homogeneous mixture forms
E) A cloudy layer forms
17. A mixture of two immiscible liquids shaken together is called:
A) Emulsion
B) Solution
C) Suspension
D) Gel
E) Crystal
18. Which substance could act as an emulsifier in an oil-water mixture?
A) Salt
B) Sugar
C) Soap
D) Alcohol
E) Mercury
19. Which of the following best promotes miscibility?
A) Similar molecular polarity
B) High surface tension
C) Different intermolecular forces
D) Low temperature
E) Large molecules
20. Which pair of liquids is partially miscible?
A) Acetone and water
B) Water and diethyl ether
C) Alcohol and oil
D) Oil and vinegar
E) Gasoline and ethanol
- Questions on Water: Structure and the Physical Properties
- Questions About Solute and Solvent
- Questions on the Dissolving Process
Answers with Explanations
1. C – Alcohol and water are both liquids that form a homogeneous solution.
2. D – The solute is the liquid in smaller proportion.
3. C – Miscible liquids dissolve in each other in any proportion.
4. D – Oil and water are immiscible due to polarity differences.
5. B – Water and ethanol mix due to hydrogen bonding.
6. D – Increasing temperature often enhances miscibility.
7. D – A liquid-liquid solution is formed when two liquids mix completely.
8. C – Immiscible liquids do not form a uniform phase.
9. D – Oil and water form two separate layers.
10. C – The volume ratio doesn’t affect whether two liquids are miscible.
11. C – In a liquid-liquid solution, molecules are evenly mixed.
12. D – Water is polar; oil is nonpolar — they don’t mix.
13. C – Water and acetone are miscible due to polarity compatibility.
14. B – Density differences and non-interacting molecules cause layers.
15. B – In vinegar-water, water is typically the solvent.
16. D – Ethanol and water form a homogeneous solution.
17. A – Shaking two immiscible liquids creates an emulsion.
18. C – Soap can act as an emulsifier, stabilizing oil-water mixtures.
19. A – Similar polarity helps liquids mix better.
20. B – Water and diethyl ether are partially miscible, mixing only to some extent.
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