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  5. Classification of Elements and Periodicity in Properties / तत्त्वों का वर्गीकरण एवं गुणों में आवर्ति

JEE Main & Advanced Chemistry Classification of Elements and Periodicity in Properties / तत्त्वों का वर्गीकरण एवं गुणों में आवर्ति Question Bank Extended or long form of periodic table

  • question_answer
    Dobereiner traids is [RPMT 1997]

    A) \[Na\], \[K\], \[Rb\]

    B) \[Mg,\]\[S,\]\[As\]

    C) \[Cl\], \[Br,I\]

    D) \[P,\]\[S,\], \[As\]

    Correct Answer: C

    Solution :

      According to Dobernier law of triads the atomic mass of the central element was nearly the arithmetic mean of atomic masses of other two elements.


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