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Colloidal sulphur particles are negative...

Colloidal sulphur particles are negatively charged with `S_(2) O_(3)^(2)` and other ions on the surface of sulphur. Hence, the most effective electrolyte in coagulating colloidal sulphur is:

A

NaCl

B

`MgCl_(2)`

C

`AlCl_(3)`

D

`Na_(2)SO_(4)`

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The correct Answer is:
C
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