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JEE Main & Advanced Chemistry Coordination Chemistry Question Bank Nomenclature, Oxidation state and EAN number

  • question_answer
    The oxidation state of \[Co\] in \[{{\left[ Co{{\left( {{H}_{2}}O \right)}_{5}}Cl \right]}^{2+}}\] is

    A) + 2

    B) + 3

    C) + 1

    D) + 4

    Correct Answer: B

    Solution :

      \[{{[\underset{x}{\mathop{Co}}\,\,{{(\underset{0}{\mathop{{{H}_{2}}O}}\,)}_{5}}\underset{-1}{\mathop{Cl}}\,]}^{+2}}\] \[x-1=2\Rightarrow x=+\,3\].


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