CMC Medical CMC-Medical VELLORE Solved Paper-2012

  • question_answer
    Primitive earth had

    A)  reducing atmosphere  (without free oxygen)

    B)  oxidizing atmosphere (free oxygen)

    C)  Both (a) and (b)

    D)  None of the above

    Correct Answer: A

    Solution :

                    First hydrogen atoms combined with all oxygen atoms to form water and leaving no free oxygen. Thus, primitive atmosphere was reducing.


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