1.

Which of the following electrolyteswill have maximum coagulating value for AgI//Ag^(+) sol ?

Answer»

`Na_2S`
`Na_3PO_4`
`Na_2SO_4`
NaCl

Solution :The COAGULATION value decreases with increase in CHARGE of the Coagulation ion.
Coagulating power
`prop1/("coagulation value")prop` charge
As `AI//Ag^+` is a positive sol so negative ion will coause the coagulation .
Ions of the given ELECTROLYTES are, `S^(-2),PO_4^(3-),SO_4^(2-) and Cl^(-)`
As `Cl^(-)` has MINIMUM charge thus has maximum coagulating value.


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