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Question: The best coagulant for the precipitation of Fe(OH)<sub>3</sub> is-...

The best coagulant for the precipitation of Fe(OH)3 is-

A

Na3PO4

B

NaNO3

C

Na2SO4

D

NaCl

Answer

Na3PO4

Explanation

Solution

PO43\mathrm { PO } _ { 4 } ^ { 3 - } has maximum coagulating power for Fe(OH)3, a positively charged sol.