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12/12/2021 5:39 pm
Topic starter
According to one of the most widely accepted theories, earth’s atmosphere before origin of life was
(a) oxidising
(b) oxidising along with H2
(c) reducing with free O2 in small amount
(d) reducing with oxygen absent in O2 form.
1 Answer
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12/12/2021 5:40 pm
Correct answer: (b) oxidising along with H2