Colloids and Their Properties
Chemistry ⇒ Solutions and Colloids
Colloids and Their Properties starts at 10 and continues till grade 12.
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Describe the process of coagulation of colloids by electrolytes.
Describe the Tyndall effect and its significance in colloidal solutions.
Explain the difference between lyophilic and lyophobic colloids.
Explain the role of emulsifying agents in the formation of emulsions.
Explain the term 'electrophoresis' in the context of colloids.
Explain the term 'protective colloid' and give an example.
Explain why colloidal particles do not settle down under gravity.
Name the phenomenon responsible for the zig-zag movement of colloidal particles.
Which of the following is a positively charged sol?
(1) Ferric hydroxide sol
(2) Gold sol
(3) Arsenic sulphide sol
(4) Starch sol
Which of the following is an example of a colloidal system in which a gas is dispersed in a liquid?
(1) Foam
(2) Emulsion
(3) Gel
(4) Sol
Which of the following is an example of a colloidal system where both the dispersed phase and dispersion medium are liquids?
(1) Emulsion
(2) Foam
(3) Gel
(4) Aerosol
Which of the following is an example of a foam?
(1) Soap lather
(2) Milk
(3) Paint
(4) Butter
The ability of colloidal particles to adsorb ions from the solution is responsible for their __________.
The minimum concentration of an electrolyte required to cause coagulation of a sol is called its __________ value.
The movement of colloidal particles towards the oppositely charged electrode under an electric field is called __________.
The process of converting a precipitate into a colloidal sol by shaking it with a dispersion medium in the presence of a small amount of electrolyte is called __________.
State whether the following statement is true or false: Colloidal particles are smaller than true solution particles.
State whether the following statement is true or false: Colloidal particles are visible to the naked eye.
State whether the following statement is true or false: Colloidal particles can pass through ordinary filter paper but not through animal membranes.
State whether the following statement is true or false: Colloidal solutions are always transparent.
