Which of the following is a correct statement?
- Brownian motion destabilises sols.
- Any amount of dispersed phase can be added to emulsion without destabilising it.
- Mixing two oppositely charged sols in equal amount neutralises charges and stabilises colloids.
- Presence of equal and similar charges on colloidal particles provides stability to the colloidal solution.
The Correct Option is D
Solution and Explanation
The correct statement is “Presence of equal and similar charges on colloidal particles provides stability to the colloidal solution.”
This statement reflects the principle of electrostatic stabilization in colloidal systems, where the presence of similar charges on colloidal particles leads to electrostatic repulsion, preventing them from coalescing or aggregating.
So, the correct option is (D).
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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.