CMC Medical CMC-Medical VELLORE Solved Paper-2011

  • question_answer
    Which one of the following has the highest molar conductivity?

    A)  Diamminedichloroplatinum (II)

    B)  Tetramminedichlorocobalt (III) chloride

    C)  Potassium hexacyanoferrate (II)

    D)  Hexaaquochromium (III) bromide

    E)  Pentacarbonyl iron (0).

    Correct Answer: C

    Solution :

                    The molar conductivity of potassium hexacy-anoferrate (II) i.e., \[{{K}_{4}}[Fe{{(CN)}_{6}}]\]is highest because it gives maximum number of ions on ionisation. \[{{K}_{4}}[Fe{{(CN)}_{6}}]\xrightarrow{{}}4{{K}^{+}}+{{[Fe{{(CN)}_{6}}]}^{4-}}\]


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