BCECE Engineering BCECE Engineering Solved Paper-2001

  • question_answer
    The correct order of electron affinities of S, N,O and Cl is:

    A) \[O=Cl<S=N\]

    B)        \[O<S<Cl<N\]

    C) \[N<O<S<Cl\]       

    D) \[O<N<Cl<S\]

    Correct Answer: C

    Solution :

    Key Idea: The electron affinity is amount of energy released when one electron is added to isolated gaseous atom. Its value increases in period and decreases in a group. The variation are in inverse relation to size.              The correct order of electron affinities among given elements is \[N<O<S<Cl\]


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