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Science and Technology question from JKAS Prelims, 2023 by JKPSC

Consider the following statements about colloids:

• Statement I: Lyophilic sols are more stable than lyophobic sols.
• Statement II: Lyophilic colloids are extensively solvated.

From the above statements, choose the correct answer from the options given below;

Last updated May 13, 2026
Correct Answer: Option A — Both Statement I and Statement II are true
Analysis of the Statements

Statement I is true: Lyophilic sols (liquid-loving) are inherently more stable than lyophobic sols (liquid-heating). Lyophilic sols are "reversible," meaning if the dispersion medium is separated from the dispersed phase, the sol can be reconstructed simply by remixing. Lyophobic sols, however, are "irreversible" and require stabilizing agents to prevent them from coagulating.

Statement II is true: The high stability of lyophilic colloids is primarily due to two factors: the charge on the particles and extensive solvation. In these colloids, the particles of the dispersed phase are covered by a "sheath" or layer of the solvent in which they are dispersed. This solvation layer acts as a physical barrier that prevents the particles from coming close enough to aggregate or coagulate.
Answer verified by Quintessence Classes faculty — Karan Nagar, Srinagar.

About this question

JKPSC JKAS 2023 Prelims

Details

Exam JKPSC
Recruitment JKAS
Stage Prelims
Year 2023
Subject Science and Technology
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