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CMC Medical CMC-Medical VELLORE Solved Paper-2008

  • question_answer
    The electronic configuration of four elements are 1. \[[Xe]\,6{{s}^{1}}\]     2. \[[Xe]\,4{{f}^{14}},5{{d}^{1}},6{{s}^{2}}\] 3. \[[\text{Ar}]\,4{{s}^{2}}4{{p}^{5}}\]    4. \[[\text{Ar}]\,3{{d}^{7}},4{{s}^{2}}\] Which one of the following statements about these elements is not correct?

    A)  1 is a strong reducing agent

    B)  2 is a d-block element

    C)  3 has high electron affinity

    D)  4 shows variable oxidation state

    E)  The compound formed between 1 and 3 is ionic

    Correct Answer: B

    Solution :

                    \[[Xe]\,\,4{{f}^{14}},5{{d}^{1}},6{{s}^{2}}\] is not a d-block element. It is lutetium and it is present in lanthanide series, so it is \[f\text{-}\]block element.


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