1.

Explain the phenomenon observed An eleetrlc current is passed through a colloidal solution.

Answer» Electrophoresis : The existence of charge on colloidal particles is confirmed by electrophoresis experiment.
When electric potential is applied across two platinum electrodes dipping in a colloids solution, the colloidal particles move towards one or the other electrode. The movement of colloidal particles under an applied emf is called "electrophoresis".
`to` Positive charged particles move towards the cathode while negative charged particies towards anode.


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