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NEET Chemistry Coordination Chemistry Question Bank Self Evaluation Test - Co-ordination Compounds

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

    A) \[{{[Fe{{({{H}_{2}}O)}_{6}}]}^{3+}}\]         

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

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

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

    Correct Answer: C

    Solution :

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


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