Surface ChemistryHard

Question

For the coagulation of a particular colloidal solution, the order of coagulation power of some electrolytes is in the order Na3PO4 > BaSO4 > AlCl3. Which of the following information(s) may be correct for such colloid?

Options

A.In electro-osmosis, the dispersion medium move towards the anode.
B.Di­ used layer around colloidal particles in the electric double layer mostly contains negatively charged particles.
C.It may be basic dye such as methylene blue.
D.It may be metal

Solution

$PO_{4}^{3 -} > SO_{4}^{2 -} > Cl^{-}$

⇒ Sol particles are positively charged.

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