Which ion has least flocculation value for ` a+ ve` sol ?

Options

A. `[Fe(CN)_6]^(4-)`
B. ` Cl^(-)`
C. `SO_4^(2-)`
D. `PO_4^(3-)`

Answer

A

Explanation

More is coagulating power , lesser is coagulation value . This is Hardy-Schulze rule .].