The correct order of coagulating power of the following ions to coagulate the positive sol is…
The correct order of coagulating power of the following ions to coagulate the positive sol is
$\underset{\mathrm{I}}{\left[\mathrm{Fe}(\mathrm{CN})_6\right]^{4-},} \underset{\mathrm{II}}{\mathrm{Cl}^{-}}, \underset{\mathrm{III}}{\mathrm{SO}_4^{2-}}$
I $>$ II $>$ III
III $>$ II $>$ I
I $>$ II $>$ III
I $>$ III $>$ II
Solution
Coagulating power $\propto$ Charge
Charge on $\left[\mathrm{Fe}(\mathrm{CN})_6\right]^{4-}>\mathrm{SO}_4^{2-}>\mathrm{Cl}^{-}$
$\therefore$ Correct order of coagulating power is
I $>$ III $>$ II