1.

Ferric hydroxide sol is positively charged colloid. The coagulating power of NO_3^-, SO_4^(2-) and PO_4^(3-) ions would be in the order

Answer»

`NO_3^(-) GT SO_4^(2-) gt PO_4^(3-)`
`SO_4^(2-) gt NO_3^(-) gt PO_4^(3-)`
`PO_4^(3-) gt SO_4^(2-) gt NO_3^-`
`NO_3^(-) = SO_4^(2-) =PO_4^(3-)`

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