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How do sol particles acquire positive or negative charge by preferential adsorption of ions?

Options

  1. ABy capturing electrons
  2. BBy adsorbing metal ions
  3. CBy adsorbing gas molecules
  4. DBy capturing protons

Correct answer

B. By adsorbing metal ions

Step-by-step solution

The paragraph states that sol particles acquire positive or negative charge by preferential adsorption of positive or negative ions. In the examples provided, adsorption of metal ions (Ag+, Fe3+) results in charged colloidal sols.

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