The charge on Fe(OH)3 sol is due to 

  1. A

    Adsorption of hydroxyl ion

  2. B

    Adsorption of hydrogen ion 

  3. C

    Adsorption of ferric acid

  4. D

    Adsorption of ferric ion 

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    Solution:

    FeCl3 is added to excess hot water, a positively charged sol of ferric hydroxide is formed due to adsorption of Fe3+ ions. 

    Fe(OH)3/Fe3+

    Positively charged

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