(D) Colloidal sols are thermodynamically unstable systems because they have a high surface energy due to the large surface area of the dispersed phase

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Colloidal sols are thermodynamically stable.

(D) Colloidal sols are thermodynamically unstable systems because they have a high surface energy due to the large surface area of the dispersed phase particles. They are kinetically stable due to the presence of charge or solvation,but they tend to coagulate or settle over time. Therefore,the statement that colloidal sols are thermodynamically stable is incorrect.

Class 12 Chemistry Surface Chemistry Colloids, Emulsion, Gel and Their properties with application

Easy

Identify the incorrect statement.

A
Addition of a small amount of $AlCl_3$ to gold sol causes coagulation,but if $AlCl_3$ is added in excess,coagulation does not occur.
B
Organic ions are adsorbed more strongly on a charged surface compared to inorganic ions.
C
Both emulsifiers and peptizing agents stabilize colloids,but their functions are different.
D
Colloidal sols are thermodynamically stable.