BHU PMT BHU PMT Solved Paper-2004

  • question_answer
    Which of the following has the highest first ionisation energy?

    A)  Li                                           

    B)  Be

    C)  B                                           

    D)  C

    Correct Answer: D

    Solution :

                     The given choices belong to second period. lonisation energy increases when we move from left to right in period. Therefore, C has highest first ionization energy (lonisation energy of Li, Be, B and C are 520, 899, 801, 1086 kJ/mol respectively.)


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