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RAJASTHAN ­ PET Rajasthan PET Solved Paper-2011

  • question_answer
    Four successive members of the first row of transition elements are listed below with their atomic numbers. Which one of them is expected to have the highest third ionization enthalpy?

    A)  Vanadium \[(Z=23)\]

    B)  Chromium \[(Z=24)\]

    C)  Iron \[(Z=26)\]

    D)  Manganese \[(Z=25)\]

    Correct Answer: D

    Solution :

     In\[Mn,\]third electron which is removed in third ionisation potential belongs to\[3{{d}^{5}}\] subshell and\[3{{d}^{5}}\]subshell has highest stability. Therefore, Mn shows highest third ionisation enthalpy.


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