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BCECE Engineering BCECE Engineering Solved Paper-2002

  • question_answer
    The oxidation state of sulphur in \[{{\text{H}}_{\text{2}}}\text{S}{{\text{O}}_{\text{4}}}\text{:}\]

    A) \[+\,6\]               

    B)        \[~+\,4\]

    C) \[~+\,2\]

    D)        \[+\,3\]

    Correct Answer: A

    Solution :

    Idea: The sum of oxidation states off elements in a compound is always zero. Let oxidation state of S in\[{{H}_{2}}S{{O}_{4}}=x.\] \[\therefore \]  \[(+\,1\times 2)+x+(-2\times 4)=0\] or            \[x+2-8=0\] \[\therefore \]  \[x=+\,\,6\]


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