| ⇦ | 
| ⇨ |
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 golden age of Dinosaurs was during which of the following era?
- Opening of flower is an example of
- Quiescent centre is found in root. The concept of quiiescent centre was proposed
- Which one of the following occurs in radioactive fall out and behaves like calcium
- Measuring Biochemical Oxygen Demand (BOD) is a method used for :
Topics: Evolution
(132)
Subject: Biology
(4253)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- The golden age of Dinosaurs was during which of the following era?
- Opening of flower is an example of
- Quiescent centre is found in root. The concept of quiiescent centre was proposed
- Which one of the following occurs in radioactive fall out and behaves like calcium
- Measuring Biochemical Oxygen Demand (BOD) is a method used for :
Topics: Evolution (132)
Subject: Biology (4253)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
18000+ students are using NEETLab to improve their score. What about you?
Solve Previous Year MCQs, Mock Tests, Topicwise Practice Tests, Identify Weak Topics, Formula Flash cards and much more is available in NEETLab Android App to improve your NEET score.
Share this page with your friends
Leave a Reply