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 The nature of charge on resulting colloidal particles when FeCl3 is added to excess of hot water is:

a. positive
b. neutral
c. sometimes positive and sometimes negative
d. negative
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The correct option is A) positive 

Explaination ::

 A positively charged sol of hydrated ferric oxide is formed due to the adsorption of Fe3+ ions , if FeCl3 is added to excess hot water .

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