Why is ferric hydroxide colloid positively charged when prepared by adding ferric chloride to hot water ?A. Due to precipitation of ferric hydroxide there is an excess of `Fe^(3+)` ions.B. Due to preferential adsorption of `Fe^(3+)` ions by the sol of `Fe(OH)_(3)`.C. Due to absence of any negatively charged ion.D. Due to adsorption of `OH^(-)` and `Cl^(-)` ions, the remaining sol has only `Fe^(4+)` ions.

Why is ferric hydroxide colloid positively charged when prepared by ad

1.	Why is ferric hydroxide colloid positively charged when prepared by adding ferric chloride to hot water ?A. Due to precipitation of ferric hydroxide there is an excess of `Fe^(3+)` ions.B. Due to preferential adsorption of `Fe^(3+)` ions by the sol of `Fe(OH)_(3)`.C. Due to absence of any negatively charged ion.D. Due to adsorption of `OH^(-)` and `Cl^(-)` ions, the remaining sol has only `Fe^(4+)` ions.
Answer» Correct Answer - B The adsorption of positively charged `Fe^(3+)` ions by the sol of hybrated ferric oxide results in positively charged colloid.