Question:
The nature of charge on resulting colloidal particles when $\mathrm{FeCl}_{3}$ is added to excess of hot water is :
Correct Option: 1
Solution:
If $\mathrm{FeCl}_{3}$ is added to hot water, a positively charged sol, hydrated ferric oxide is formed due to adsorption of $\mathrm{Fe}^{3+}$ ions.
$\mathrm{Fe}_{2} \mathrm{O}_{3} \cdot \times \mathrm{H}_{2} \mathrm{O} / \mathrm{Fe}^{3+}$
Positively charged.
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