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NEET AIPMT SOLVED PAPER MAINS 2012

  • question_answer
    Four successive members of the first series of the transition metals are listed below. For which one of them the standard potential \[({{E}^{o}}_{{{M}^{2+}}/M})\]positive sign?                                                                               

    A)  Co (Z = 27)      

    B)  Ni (Z = 28)          

    C)  Cu (Z = 29)      

    D)  Fe (Z = 26)

    Correct Answer: C

    Solution :

    In 3d-series melting point increases as we move from left to right. But \[Mn\]shows low melting point due to its complex formatting nature. It is unable to form metallic and covalent bonds.
    Element Second ionisation enthalpy
    \[Ti\] 1320
    \[V\] 1376
    \[Cr\] 1513
    \[Mn\] 1635


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