2. Solved Papers
  3. CEE Kerala Engineering

CEE Kerala Engineering CEE Kerala Engineering Solved Paper-2005

  • question_answer
    The order of first ionization energies of the elements\[Li,Be,B,Na\]is:

    A) \[Li>Be>B>Na\]

    B) \[Be>B>Li>Na\]

    C) \[Na>Li>B>Be\]

    D) \[Be>Li>B>Na\]

    E) \[B>Be>Li>Na\]

    Correct Answer: B

    Solution :

    Ionization energies increase in a period on Moving left to right while it decreases in a group on moving downward. The I.E. of Be is greater than B due to completely filled s-orbital. Hence, the order of IE is as: \[Be>B>Li>Na\]


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