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10th Class Science Periodic Classification of Elements Question Bank Periodic Classification of Elements

  • question_answer
    Which one of the following is a Dobereiner triad?

    A) C, Mg and Na   

    B) O, N and Cl        

    C) Li, Na and K                       

    D) Fe, Cu, Zn

    Correct Answer: C

    Solution :

    Lithium, sodium and potassium form a Dobereiner triad.


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