Which of the best coagulant for the prec

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Target Exam

CUET

Subject

Chemistry

Chapter

Physical: Surface Chemistry

Question:

Which of the best coagulant for the precipitation of Fe(OH)₃ sol?

Options:

NaNO₃

NaHPO₄

Na₃PO₄

Na₂SO₄

Correct Answer:

Na₃PO₄

Explanation:

PO₄^3- is most effective for +vely charged Fe(OH)₃ sol due to higher charge.