2. Solved Papers
  3. CEE Kerala Engineering

CEE Kerala Engineering CEE Kerala Engineering Solved Paper-2008

  • question_answer
    The primary and secondary valencies of chromium in the complex ion, dichlorodioxalatochromium (III), are respectively

    A) 3, 4                                        

    B) 4, 3

    C) 3,6                         

    D)        6, 3

    E)  4, 4

    Correct Answer: C

    Solution :

    The formula of dichlorodioxalatochromium (III) is\[{{[Cr(C{{l}_{2}}){{(Ox)}_{2}}]}^{3-}}\] Primary valency of a metal\[(Cr)\]in the complex = oxidation number of that metal \[=+3\] Secondary valency of chromium in complex = coordination number \[=+6\] (\[\because \]Coordination number is the number of ligands attached to the central metal ion and oxalate ion is a bidentate ligand ie, can coordinate at two positions)


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