18 Questions
What is the term used to describe the process when a sol is converted into a gel?
Gelation
Which property of colloids is responsible for the Tyndall Effect?
Scattering of light by colloidal particles
What is the term used to describe the random movement of colloidal particles suspended in a liquid or gas?
Brownian Movement
What contributes to the stability of pure colloidal solutions?
Charges on colloidal particles repelling each other
Which term describes the process when a gel is converted into a sol?
Solation
What type of colloid is less stable and easily precipitated by neutral salts?
Hydrophilic colloids
Which type of colloid has particle sizes greater than 100 nm?
Suspensions
In which type of colloid do the particles form clusters of molecules and can be seen under an electron microscope?
Colloidal solutions
Why do colloidal solutions remain dispersed throughout water in a stable manner?
As a result of their small particle size
What property allows colloidal particles to be pass through filter paper but not through a semipermeable membrane?
Particle size
Which type of colloid can be separated by settling down at the bottom of the container separated by a liquid layer?
Suspensions
What electrical property do colloidal particles possess?
+/- charges that are uniform across all particles in a system
What is the main factor responsible for the stability of colloidal solutions?
Aggregation of units with like charge
Which type of colloids are characterized by being 'liquid loving'?
Hydrophilic colloids
What property makes hydrophilic colloids more stable and less easily precipitated?
Presence of a shell of electric charges
Which classification of colloids is formed by dispersed particles surrounded only by a shell of electric charges?
Lyophobic colloids
How can hydrophilic colloids be precipitated from a solution?
By neutralizing the charges followed by dehydration
What factor distinguishes hydrophobic colloids from hydrophilic colloids?
'Liquid loving' or 'liquid hating' nature
Learn about the classification of colloids into hydrophilic and hydrophobic categories. Understand the factors that contribute to the stability of colloidal solutions.
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