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AMU Medical AMU Solved Paper-1998

  • question_answer
    Oxidation numbers of carbon in\[C{{H}_{2}}C{{l}_{2}},C{{O}_{2}}\] and\[CO_{3}^{2-}\]are respectively

    A)  \[0,+4,+4\]         

    B)  \[+2,+2,-2\]

    C)  \[+4,+4,+4\]       

    D)  \[-4,+4,+2\]

    Correct Answer: A

    Solution :

    :
    \[C{{H}_{2}}C{{l}_{2}}\] \[C{{O}_{2}}\] \[CO_{3}^{2-}\]
    \[+x+2(+1)+2(-1)=0\] \[x+2(-2)=0\] \[x+3(-2)=-2\]
    \[x+2-2=0\] \[x-4=0\] \[x-6=-2\]
    \[x=0\,x=+4\] \[x=+4\]


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