Name two positively and two negatively charged so/s
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Some examples of negatively charged sols are starch and arsenious sulphide. Positively charged sol of hydrated ferric oxide is formed when FeCl3 is added to excess of hot water and a negatively charged sol of hydrated ferric oxide is formed when ferric chloride is added to NaOH solution.
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Ferric hydroxide is a positively charged sol whereas Gold, Starch and arsenious sulphide are negatively charged sols.
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