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

Railways General Science & Technology Classification of Elements and Periodicity in Properties / तत्त्वों का वर्गीकरण एवं गुणों में आवर्ति Sample Paper Classification of Elements and Periodicity in Properties Sample Test Paper-15

  • question_answer
    In which of the following groups, are the elements written in the descending order of their respect atomic weights?

    A)  Nitrogen, carbon, oxygen, hydrogen

    B)  Oxygen, argon, nitrogen, hydrogen

    C)  Oxygen, nitrogen, helium, hydrogen

    D)  Oxygen, nitrogen, helium, bromine

    Correct Answer:


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