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

  • question_answer
    To study the chemical properties, Mendeleev concentrated on the compounds formed by different elements with X and Y. Identify X and Y.

    A)
    X Y
    Oxygen Nitrogen
                   

    B)
    X Y
    Oxygen Hydrogen
                   

    C)
    X Y
    Hydrogen Nitrogen
                   

    D)
    X Y
    Hydrogen Carbon

    Correct Answer: B

    Solution :

    Mendeleev concentrated on the oxides and hydrides of various elements to study their chemical properties.                


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