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Which of the following process is not responsible for the presence of electric charge on the sol particles?
(i) Electron capture by sol particles.
(ii) Adsorption of ionic species from solution.
(iii) Formation of Helmholtz electrical double layer.
(iv) Absorption of ionic species from solution.
Answers (1)
The answer is the option (iv).
Charge on sol particles is mostly due to the preferential adsorption of either positive or negative ions on their surface. Although there is no absorption of ionic species. Other processes responsible for presence of electric charge on sol particles include electron capture by sol particles and formation of Helmholtz electrical double layer.
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