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Which of the following is the most effec...

Which of the following is the most effective electrolyte for the coagulation of `Fe_(2)O_(3).H_(2)O//Fe^(3+)` sol ? `KCl,AlCl_(3),MgCl_(2),K_(4)[Fe(CN)_(6)]`

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Sol has positive charge. For is coagulation, `[Fe(CN_(6)]^(-4)` ion carrying maximum negative charge i.e., -4 units are the most effective according to Hardy-Schulze law.
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DINESH PUBLICATION-SURFACE CHEMISTRY -QUESTION FROM BOARD EXAMINATIONS
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  14. Write differences between physisorption and chemisorption.

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