Advertisements
Advertisements
प्रश्न
What is the reason for the stability of colloidal sols?
Write the main reason for the stability of colloidal sols.
Advertisements
उत्तर १
Reasons for the stability of colloidal sols:
a. Coagulation of the colloidal sol is prevented because of the presence of equal and similar charges on the colloidal particles.
b. Colloidal particles are covered by a sheath of liquid in which they are extensively solvated because of which they acquire stability.
उत्तर २
There are two main reasons for the stability of colloidal sols:
1. Electrostatic stabilisation: Presence of equal and similar charges on the colloidal particles prevents coagulation of the colloidal sol.
2. Solvation: Colloidal particles are covered by a sheath of liquid in which they are extensively solvated, thereby providing stability.
APPEARS IN
संबंधित प्रश्न
Define the following term : Brownian movement
Explain what is observed when an electrolyte NaCl is added to hydrated ferric oxide sol.
What happens when a freshly prepared precipitate of Fe(OH)3 is shaken with a small amount of FeCl3 solution?
The values of colligative properties of colloidal solution are of small order in comparison to those shown by true solutions of same concentration because of colloidal particles ______.
What happens when a lyophilic sol is added to a lyophobic sol?
(i) Lyophobic sol is protected.
(ii) Lyophilic sol is protected.
(iii) Film of lyophilic sol is formed over lyophobic sol.
(iv) Film of lyophobic sol is formed over lyophilic sol.
How does it become possible to cause artificial rain by spraying silver iodide on the clouds?
Give reason for the following:
Lyophilic colloidal solutions are more stable than lyophobic colloidal solutions.
The important factor in the stabilization of a colloidal solution is ______
Define coagulation.
In order to cause coagulation of 100 ml Arsenious sulphide sol 111.7 mg of 2 M NaCl solution is used, the coagulation value of NaCl will be ______.
