Define electro-osmosis.
admin On placing a colloidal solution under the influence of an electric field, the particles of the dispersion medium move towards oppositely charged, provided the colloidal particles are not allowed to…
What do you mean by Coagulation?
Coagulation: Coagulation is a process which involves coming together of colloidal particles so as to change into large sized particles which ultimately settle as a precipitate or float on the…
Discuss how the coagulation can occur?
Coagulation can be caused by the following methods: By electrophoresis: In electrophoresis, the particles of dispersed phase move towards oppositely charged electrode and get neutralized. If the process is continued…
Discuss the protective action of Lyophilic Colloids and Gold number
Lyophobic sols are unstable and are easily precipitated by the addition of electrolytes. However it is observed that the addition of certain lyophilic colloids like gums, soaps, gelatin etc. To…
What are Emulsions and how are they prepared?
An emulsion is colloidal dispersion in which both the dispersed phase and the dispersion medium are liquids. The two well known examples of emulsions are: 1) Milk in which the…
Discuss the various methods of emulsions to test the type of emulsion and also discuss the properties of Emulsions.
Various methods of emulsions to test the type of emulsion are as follows: a) Microscopic methods: To a small amount of the given emulsion, a few drops of water are…
What are the applications of emulsions? Also give the harmful effects of Emulsions
Applications of emulsions: Emulsions are useful in a number of ways. Some of the applications are discussed below: a) In the metallurgical processes, the concentration of ore by forth floatation…
What are the Applications of Colloids?
Colloids play a very significant role in nature and in our daily life. Some of the important applications of colloids are discussed below: 1) Medicines: Medicines in colloidal form are…
What do you mean by gels? How they are classified?
The colloidal system constituting the liquid as the dispersed phase and the solid as the dispersion medium is known as gel. There are some sols that have a high concentration…
What do you mean by catalyst?
Catalyst is a substance which can change the speed of a chemical reaction without being used up in that reaction and the phenomenon is known as catalysis. Catalyst is divided…