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JEE Main & Advanced Chemistry Classification of Elements and Periodicity in Properties / तत्त्वों का वर्गीकरण एवं गुणों में आवर्ति Question Bank Self Evaluation Test - Classification of Elements and Periodicity in Properties

  • question_answer
    Which is the correct order of second ionization potential of \[C,\text{ }N,\text{ O}\] and F in the following?

    A) \[O>N>F>C\]   

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

    C) \[F>O>N>C\]   

    D) \[C>N>O>F\]

    Correct Answer: B

    Solution :

    [b] The second ionization potential means removal of electron from cation \[{{C}^{+}}=1{{s}^{2}}2{{s}^{2}}2{{p}^{1}},{{N}^{+}}=1{{s}^{2}}2{{s}^{2}}2{{p}^{2}}\] \[{{O}^{+}}=1{{s}^{2}}2{{s}^{2}}2{{p}^{3}},\,{{F}^{+}}=1{{s}^{2}}2{{s}^{2}}2{{p}^{4}}\] Therefore \[O>F>N>C\]


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