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JIPMER Jipmer Medical Solved Paper-2003

  • question_answer
    Oxidation number of Cr in \[{{K}_{2}}C{{r}_{2}}{{O}_{7}}\] is:

    A)  2                                            

    B)  4                            

    C)  6                            

    D)         7

    Correct Answer: C

    Solution :

    \[{{K}_{2}}C{{r}_{2}}{{O}_{7}}\] \[2(+1)+2\,2(x)+7\,(-2)=0\] \[2+2x-14=0\] \[2x=12\] \[x=6\]


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