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प्रश्न
Which was ale sent in the atmosphere at the time of origin of life?
पर्याय
NH3
H2
O2
CH4
MCQ
उत्तर
H2
Explanation:
In the early atmosphere, hydrogen atoms were the most abundant and most reactive. To make water, hydrogen atoms first compete with all oxygen atoms, leaving no oxygen. This primordial environment was a reducing atmosphere (devoid of free oxygen), as opposed to today's oxidising atmosphere (with free oxygen).
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