NEET Sample Paper NEET Sample Test Paper-19

  • question_answer The common oxidation state of the elements of lanthanide series is

    A)  +1                             

    B)  +3

    C)  +2                

    D)  +4

    Correct Answer: B

    Solution :

    The elements which are partly filled by orbitals are called lanthanides or lanthanones. The elements from cerium (58) to Lutetium (71) are lanthanides. Their general electronic configuration is \[(n-2){{f}^{1/14}}(n-1){{d}^{0-2}}n{{s}^{1-2}}.\]Lanthanides show variable oxidation states but + 3 is their most stable and important oxidation state. Hence, the correct option is [b].


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