10 Questions
What is the purpose of using lyophilic colloids in protecting lyophobic colloids?
To form a protective layer around lyophobic particles, shielding them from electrolytes
Which type of emulsion has water as the dispersion medium?
Oil dispersed in water (O/W type)
What is the role of an emulsifying agent in stabilizing an emulsion?
To form an interfacial film between suspended particles and the medium
What is a defining characteristic of irreversible sols?
They are readily precipitated and cannot be re-formed by simple means
In which type of colloids do macromolecules form solutions in the colloidal range?
Macromolecular colloids
What differentiates lyophobic sols from lyophilic sols?
Lyophobic sols coagulate easily and require stabilizing agents
What is the main characteristic of lyophilic colloids?
They can be reconstituted by remixing with the dispersion medium.
What term is used to describe colloidal sols formed by substances like gum, gelatine, and starch mixed with a suitable liquid?
Lyophilic sols
What happens if the dispersion medium is separated from the dispersed phase in a lyophobic sol?
It coagulates readily.
Which term describes substances that do not form colloidal sols when simply mixed with the dispersion medium?
Lyophobic sols
Test your knowledge of lyophilic and lyophobic colloids, as well as emulsions. Learn about how protective colloids work and the properties of liquid-liquid colloidal systems.
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