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JEE Main & Advanced JEE Main Paper (Held On 10-Jan-2019 Morning)

  • question_answer
    The metal used for marking X-ray tube window is: [JEE Main Online Paper (Held On 10-Jan-2019 Morning]

    A) Ca                                           

    B)                  Na   

    C)                  Mg                                           

    D)                  Be

    Correct Answer: D

    Solution :

    ?Be? metal is used in x ray tube window it is transparent to x rays


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