AMU Medical AMU Solved Paper-1997

  • question_answer Whereas todays atmosphere contains gases like\[C{{O}_{2}}\]and\[{{H}_{2}}O\]vapour, but at the time of the origin of life was made up mainly of

    A) \[N{{H}_{3}},C{{H}_{4}}\]and\[{{H}_{2}}O\]vapour

    B) \[NO,N{{O}_{2}}\]and\[C{{O}_{2}}\]

    C) \[N{{H}_{3}},N{{O}_{2}}\]and\[{{H}_{2}}O\]vapour

    D) \[C{{H}_{4}},NO\]and\[C{{O}_{2}}\].

    Correct Answer: A

    Solution :

    : In the primitive atmosphere of earth hydrogen was most abundant and reactive. Later water, ammonia and methane were formed. Because of high temperature all these were present in gaseous form. The primitive atmosphere was reducing and free molecules of oxygen and ozone were absent.

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