Question

Which was absent in the atmosphere at the time of origin of life?

(a) NH3

(b) H2

(c) O2

(d) CH4.

Answer 1

Atmosphere formation took place as the planet cooled down at the time of origin of life. Initially, scientists reasoned that most of the matter in our solar system is hydrogen, therefore, the earth must have hydrogen at the time of origin.

During the time of earth formation, there was an inordinate amount volcanic eruption, resulted in the release of volcanic gas. These volcanic gas became part of the newly formed atmosphere. Analysis of gas vent of modern volcanoes suggests that early atmosphere consisted of water vapor, carbon dioxide, nitrogen and the trace amount of hydrogen, methane, hydrogen sulfide, hydrogen cyanide, and formaldehyde.