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Among the electrolytes Na (2) SO(4), CaC...

Among the electrolytes `Na _(2) SO_(4), CaCl_(2), Al_(2) (SO_(4)) _(3) and NH_(4)Cl,` the most efective coagulating agent for `Sb _(2) S_(3)` sol is

A

`Na _(2) SO_(4)`

B

`CaCl_(2)`

C

`Al _(2) (SO_(4)) _(3)`

D

`NH_(4)Cl`

Text Solution

Verified by Experts

The correct Answer is:
C
`Sb _(2) S_(3)` is a negatively charged sol. Hence `Al_(2) (SO_(4)) _(3)` is the most effective coagulating agent because higher the magnitude of opposite charge `(Al ^(3+)),` higher is the coagulating power.
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