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JEE Main & Advanced Sample Paper JEE Main - Mock Test - 24

  • question_answer
    In the complexes \[{{[Fe{{({{H}_{2}}O)}_{6}}]}^{3+}},{{[Fe{{(CN)}_{6}}]}^{3-}}\],\[{{[Fe{{({{C}_{2}}{{O}_{4}})}_{3}}]}^{3-}}\]and\[{{[FeC{{l}_{6}}]}^{3-}}\], more stability is shown by

    A) \[{{[Fe{{({{H}_{2}}O)}_{3}}]}^{3+}}\]         

    B) \[{{[Fe{{(CN)}_{6}}]}^{3-}}\]

    C) \[{{[Fe{{({{C}_{2}}{{O}_{4}})}_{3}}]}^{3-}}\]         

    D) \[{{[FeC{{l}_{6}}]}^{3-}}\]

    Correct Answer: C

    Solution :

    [c] : In\[{{[Fe{{({{C}_{2}}{{O}_{4}})}_{3}}]}^{3-}}\],  iron is present in the highest oxidation state \[F{{e}^{3+}}\]and \[{{C}_{2}}O_{4}^{2-}\]is a chelating ligand. Chelates are always more stable complexes.


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