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Which of the following statements is NOT TRUE in respect of hydrophilic sols?

1. They are quite stable and are not easily coagulated
2. There is considerable interaction between dispersed phase and dispersion medium (water)
3. The sol particles are hydrated
4. They are very sensitive to coagulation by a small concentration of electrolytes

Correct answer: They are very sensitive to coagulation by a small concentration of electrolytes

Solution

Hydrophilic sols have strong attraction for water, so their particles become highly hydrated and remain stable. Because of this protective hydration, they are not easily coagulated by small amounts of electrolytes, making that statement false.

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