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JEE Main & Advanced Chemistry Classification of Elements and Periodicity in Properties / तत्त्वों का वर्गीकरण एवं गुणों में आवर्ति Question Bank Ionisation Energy

  • question_answer
    The order of the magnitude of first ionisation potentials of Be, B, N and O is [MP PMT 1996]

    A) \[N>O>Be>B\]

    B) \[N>Be>O>B\]

    C) \[Be>B>N>O\]

    D) \[B>Be>O>N\]

    Correct Answer: A

    Solution :

    \[N>O>Be>B\] Ist ionisation energy of \[(n)\] because of half filled \[p\]-orbital.


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