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Protective sols are:...

Protective sols are:

A

lyophilic

B

lyophobic

C

both (a) and (b)

D

none of these

Text Solution

AI Generated Solution

The correct Answer is:
To solve the question "Protective sols are:", we need to understand the concepts of lyophilic and lyophobic sols. Here’s a step-by-step solution: ### Step 1: Define Protective Sols Protective sols are colloidal systems that help stabilize other colloids, particularly lyophobic sols, against coagulation or precipitation. ### Step 2: Understand Lyophilic and Lyophobic Sols - **Lyophilic Sols**: These are colloids that have a strong affinity for the solvent (usually water). They are stable and can be easily dispersed in the solvent. Examples include gelatin and starch. - **Lyophobic Sols**: These colloids have little to no affinity for the solvent. They are less stable and can easily coagulate. Examples include metal sols like gold or silver. ### Step 3: Analyze the Stability of Protective Sols Protective sols are typically lyophilic because they can stabilize lyophobic sols. The lyophilic nature allows them to interact with the solvent and prevent the aggregation of the lyophobic particles. ### Step 4: Conclusion Since protective sols are primarily lyophilic, the correct answer to the question is that protective sols are **lyophilic**. ### Final Answer Protective sols are **lyophilic**. ---
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