Which one of the following is an emulsion?
Which one of the following is an emulsion?
Smoke
Hair cream
Paint
Cheese
The Correct Option is B
Solution and Explanation
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.
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Concepts Used:
Surface Chemistry
The study of the chemical phenomena that occur at the interface of two surfaces which can be solid-liquid, solid-gas, solid-vacuum, liquid-gas, etc.
Read Also: Surface Chemistry
Applications of surface chemistry are:
Adsorption:
The process of attraction and aggregation of the molecules of a substance on the surface of a solid is known as adsorption. For Example, N2 adsorbs on the surface of activated charcoal
Two types of adsorption are:-
- Chemisorption: It is also known as Chemical Adsorption.
- Physisorption: It is also known as Physical Adsorption.
Corrosion:
The process through which the refined metals convert themselves into more stable compounds is known as corrosion.
Crystallisation:
The type of technique used in order to purify the substances to separate Solids from liquids is known as crystallisation.
Heterogeneous Catalysis:
The process wherein a catalyst is used in order to increase the rate of a chemical reaction is known as catalysis. The catalyst does not undergo any transformation and can be recovered in a chemically unchanged state.
There are two types of catalysis:-
- When the catalyst involved and the reacting substances are same states of matter or in the same phase, it is known as Homogeneous Catalysis.
- When the catalyst involved and the reacting substances are in different states of matter or different phases, it is known as Heterogeneous Catalysis.