1.

Which of the following will have the highest coagulating power for Fe(OH)_(3) colloid?

Answer»

`PO_(4)^(3-)`
`SO_(4)^(2-)`
`Ca^(2+)`
`AL^(3+)`

Solution :`FE(OH)_(3)` is a positive sol.
Hence, greater the charge on Anion, more is the COAGULATION power.


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