Ferric hydroxide sol is positively charged colloid. The coagulating power of NO _ 3 ^ - …

Chemistry · JEE Advanced · NTA Exams — Surface Chemistry

Ferric hydroxide sol is positively charged colloid. The coagulating power of \(\mathrm{NO}_{3}^{-}, \mathrm{SO}_{4}^{2-}\) and \(\mathrm{PO}_{4}^{3-}\) ions would be in the order
  1. \(\mathrm{NO}_{3}^{-}>\mathrm{SO}_{4}^{2-}>\mathrm{PO}_{4}^{3-}\)
  2. \(\mathrm{SO}_{4}^{2-}>\mathrm{NO}_{3}^{-}>\mathrm{PO}_{4}^{3-}\)
  3. \(\mathrm{PO}_{4}^{3-}>\mathrm{SO}_{4}^{2-}>\mathrm{NO}_{3}^{-}\)
  4. \(\mathrm{NO}_{3}^{-}=\mathrm{SO}_{4}^{2-}=\mathrm{PO}_{4}^{3-}\)

Answer

(C) PO _ 4 ^ 3- > SO _ 4 ^ 2- > NO _ 3 ^ -

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