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In the primitive atmosphere which was not available in free state?
Options
(a) CH₄
(b) H₂
(c) O₂
(d) H₂O
Correct Answer:
O₂
Explanation:
The early atmosphere was without free oxygen, so atmosphere was reducing in nature. It only contained hydrogen, methane, ammonia and water vapours. At present free oxygen is present so atmosphere is oxidising in nature.
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Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- Cockroaches are
- The first living organisms that appeared on the planet, according to the most
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- In photosynthesis the light-independent reactions take place at :
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Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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