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Railways Sample Paper RRB (Group D) Sample Test Paper-7

  • question_answer
    Which one of the following noble gases is not found in the atmosphere?

    A)  Argon  

    B)  Krypton

    C)  Radon 

    D)  Xenon

    Correct Answer: C

    Solution :

    [c] Radon (Rn) is not found in the atmosphere.


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