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Among the following, the ion which will be more effective for flocculation of \(\mathrm{Fe}(\mathrm{OH})_{3}\) sol. is
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Among the following, the ion which will be more effective for flocculation of \(\mathrm{Fe}(\mathrm{OH})_{3}\) sol. is
(A) \(\mathrm{PO}_{4}{ }^{3-}\)
(B) \(\mathrm{SO}_{4}{ }^{2-}\)
(C) \(\mathrm{SO}_{3}{ }^{2-}\)
(D) \(\mathrm{NO}_{3}^{-}\)
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Ans: (A)
\(\mathrm{Fe}(\mathrm{OH})_{3}\) is a positive sol. \(\mathrm{PO}_{4}{ }^{3-}\) carrying the highest - ve charge amongst the given ions is most effective
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