Classification of Colloids
Classification of Colloids: Overview
This Topic covers sub-topics such as Sol, Foam, Gel, Aerosol, Kraft Temperature, Types of Gels, Solid Sol, Associated Colloids, Mechanism of Micelle Formation, Lyophilic Sols, Lyophobic Sols, Macromolecular Colloids and, Elastic Gels
Important Questions on Classification of Colloids
Among the following, the surfactant that will form micelles in aqueous solution at the lowest molar concentration at ambient condition is:
For micelle formation, which of the following statements are correct?
(A) Micelle formation is an exothermic process.
(B) Micelle formation is an endothermic process.
(C) The entropy change is positive.
(D) The entropy change is negative.
Match List-I with List-II
List-I | List-II | ||
(A) | negatively charged sol | (I) | |
(B) | macromolecular colloid | (II) | sol |
(C) | positively charged sol | (III) | Starch |
(D) | Cheese | (IV) | a gel |
Choose the correct answer from the options given below
Match List - I with List - II.
List-I | List-II | ||
A | Lyophilic colloid | I | Liquid-liquid colloid |
B | Emulsion | II | Protective colloid |
C | Positively charged colloid | III | |
D | Negatively charged colloid | IV | hot water |
Choose the correct answer from the options given below
Using very little soap while washing clothes, does not serve the purpose of cleaning of clothes, because
Which of the following about colloids is FALSE?
Which of the following process not involved in surfactant molecules at ?
Foam is formed when_______
The charge of the colloidal solution is dependent on the electrical charge of the _____ .
Lyophilic sols are more stable than lyophobic sols because:
At high concentration of soap in water soap behaves as a
In general, for soaps, the concentration of surfactant at is around mol.
Tyndall effect is more effectively shown by:
The sol given below with negatively charged colloidal particles is:
An ionic micelle consists of as many as _____ such ions.
When silver nitrate solution is added to potassium iodide solution then the sol produced is:
Match List I with List II :
List-I List-II
Example of colloids Classification
(a) Cheese (i) dispersion of liquid in liquid
(b) Pumice stone (ii) dispersion of liquid in gas
(c) Hair cream (iii) dispersion of gas in solid
(d) Cloud (iv) dispersion of liquid in solid
Choose the most appropriate answer from the options given below
The colloidal system consisting of a liquid adsorbate in a solid adsorbent is termed as
Black diamonds are the dispersion of