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  3. WB JEE Medical

WB JEE Medical WB JEE Medical Solved Paper-2012

  • question_answer
    The important gas which was absent during the formation of Earth is                        

    A)  oxygen          

    B)  hydrogen

    C)  nitrogen         

    D)  carbon dioxide

    Correct Answer: A

    Solution :

     The primitive atmosphere of Earth was devoid of oxygen gas. In primitive atmosphere, hydrogen atoms were most numerous and most reactive. They combined with all available oxygen atoms and formed water, which is very important for life.


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