Advertisements
Advertisements
Question
Which of the following gases probably least abundant in the early atmosphere?
Options
H2
O2
NH3
CO
MCQ
Advertisements
Solution
O2
Explanation:
The early Earths atmosphere was reducing, lacking free oxygen. Gases such as hydrogen (H2), ammonia (NH3), and carbon monoxide (CO) were present in significant amounts, but oxygen was conspicuously absent because it only began accumulating after the evolution of photosynthetic aerobic organisms.
shaalaa.com
Is there an error in this question or solution?
