| ⇦ | 
| ⇨ |
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.
Related Questions: - The most abundant prokaryotes helpful to humans in making curd from milk
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Topics: Evolution
(132)
Subject: Biology
(4253)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- The most abundant prokaryotes helpful to humans in making curd from milk
- Insecticides usually act upon
- Hydroids and leptoids are
- The domestic sewage in large cities
- A chemical signal that has both endocrine and neural roles is ?
Topics: Evolution (132)
Subject: Biology (4253)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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