Chemistry - Surface Chemistry Question with Solution | TestHub

Coagulating power$\propto \frac{1}{\mathrm{c}\mathrm{o}\mathrm{a}\mathrm{g}\mathrm{u}\mathrm{l}\mathrm{a}\mathrm{t}\mathrm{i}\mathrm{n}\mathrm{g}\text{ value}}\propto \text{charge}$

As$\frac{\mathrm{A}\mathrm{g}\mathrm{I}}{\mathrm{A}{\mathrm{g}}^{+}}$is a positive sol so negative ion will cause the coagulation.

Ions of the given electrolytes are,${\mathrm{S}}^{2-},\mathrm{P}{\mathrm{O}}_4^{3-},\mathrm{S}{\mathrm{O}}_4^{2-}$and$\mathrm{C}{\mathrm{l}}^{-}$.

As$\mathrm{C}{\mathrm{l}}^{-}$has minimum charge thus has maximum coagulating value.