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UPSC Chemistry Classification of Elements and Periodicity in Properties / तत्त्वों का वर्गीकरण एवं गुणों में आवर्ति Question Bank Elements Classification and Chemical Bonding

  • question_answer
          Which of the following elements A, B, C, D and E with atomic number 3, 11, 15, 18 and 19 respectively belong to the same group?

    A) A, B, C                 

    B)        B, C, D

    C) A, D, E                 

    D)        A, B, E

    Correct Answer: D

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