J & K CET Medical J & K - CET Medical Solved Paper-2013

  • question_answer
    The +1 oxidation state of thallium is more stable than its +3 oxidation state because of

    A)  its atomic size      

    B)  its ionization potential

    C)  inert pair effect     

    D)  diagonal relationship

    Correct Answer: C

    Solution :

     Inert pair effect due to this thallium is found commonly in +1 oxidation state. It has electronic configuration as \[[Xe]4{{f}^{14}}5{{d}^{10}}6{{s}^{2}}6{{p}^{1}}\]and shows oxidation states + 3 and + 1,


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