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Railways R.R.C. (Bilaspur) Solved Paper Held on 24-11-2013

  • question_answer
    What is the chemical formula of Ozone gas?

    A) \[{{O}_{2}}\]                           

    B) \[{{O}_{3}}\]

    C) \[{{H}_{2}}{{O}_{2}}\]                      

    D) CO

    Correct Answer: B

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