Question
Chemistry Question on Surface Chemistry
Which one of the following is an emulsion?
A
Smoke
B
Hair cream
C
Paint
D
Cheese
Answer
Hair cream
Explanation
Solution
An emulsion is when one liquid is spread out in tiny droplets within another liquid that it cannot mix with.
Hair cream can be considered as an emulsion, with oil droplets dispersed in water. Paint, on the other hand, can be categorized as either an emulsion or a suspension, depending on its composition.
| Cheese, conversely, is a colloid where solid particles are spread throughout a liquid. Smoke, however, is classified as an aerosol, a colloid in which solid or liquid particles are suspended within a gas.Example | Type of Emulsion |
|---|---|
| Smoke | Aerosol |
| Hair cream | Emulsion |
| Paint | Sol |
| Cheese | Gel |
So, the correct option is (B) : Hair cream.