The presence of electric charge on colloidal particles is indicated by the property, called:

dialysis

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solubility

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eletrophoresis

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osmosis

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Solution

The correct option is A eletrophoresis
When an electric current is passed through a colloidal solution, the charged particles move towards the oppositely charged electrode and coagulate due to loss of charge. The phenomenon involving the migration of colloidal particles under the influence of electric field towards the oppositely charged electrode, is called electrophoresis or cataphoresis.

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