In the primitive atmosphere which was not available in free state?

⇦

⇨

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:

1. The relationship between two organisms where one receives benefit at the cost
2. Three of the following statements regarding cell organelles are correct while
3. Which elements are essential for the photophosphorylation
4. By protoplasmic streaming theoryhow sugar is translocated from one sieve tube
5. In cockroch, the anthrodical membrane

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