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Chhattisgarh PMT Chhattisgarh PMT Solved Paper-2007

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

    A)  Vanadium \[(Z=23)\]

    B)  Manganese \[(Z=25)\]

    C)  Chromium \[(Z=24)\]

    D)  Iron \[(Z=26)\]

    Correct Answer: B

    Solution :

    After losing two electrons \[Mn\] gets half-filled 'd'-orbital which is very stable. Hence, 3rd ionisation enthalpy is maximum for \[Mn\].


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