JEE Main & Advanced Chemistry Surface & Nuclear Chemistry / भूतल और नाभिकीय रसायन Sample Paper Topic Test - Surface Chemistry

  • question_answer
    Ferric hydroxide sol is positively charged colloid. The coagulating power of \[NO_{3}^{-},\,SO_{4}^{2-}\] and \[PO_{4}^{3-}\] ions would be in the order

    A) \[NO_{3}^{-}>SO_{4}^{2-}>PO_{4}^{3-}\]

    B) \[SO_{4}^{2-}>NO_{3}^{-}>PO_{4}^{3-}\]

    C) \[PO_{4}^{3-}>SO_{4}^{2-}>NO_{3}^{-}\]

    D) \[NO_{3}^{-}=SO_{4}^{2-}=PO_{4}^{3-}\]

    Correct Answer: C

    Solution :

    According to Hardy schulze rule the ions having opposite charge to sol particle cause coagulation and greater the valency of oppositely charged ion more is the coagulating power \[(PO_{4}^{3-}>SO_{4}^{2-}>NO_{3}^{-}\]).


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