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Give the order of coagulating power of C...

Give the order of coagulating power of `Cl, SO_(4)^(2-), PO_(4)^(3-)` in the coagulation of positive sols.

A

`PO_(4)^(3-) gt SO_(4)^(2-) gt Cl^(-)`

B

`SO_(4)^(2-) gt Cl^(-) gt PO_(4)^(3-)`

C

`Cl^(-) gt PO_(4)^(3-) gt SO_(4)^(2-)`

D

`Cl^(-) gt SO_(4)^(2-) gtPO_(4)^(3-)`

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The correct Answer is:
A
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