Q. According to Oparin, which one of the following was not present in the primitive atmosphere of the earth?
A) Methane
B) Oxygen
C) Hydrogen
D) Water vapour
Explanation
According to Oparin, the atmosphere of primitive earth was reducing because H atoms were most numerous and most reactive. Large quantities of $H_{2},\ N_{2},\ H_{2}O,\ CO_{2},\ CH_{4}and\ NH_{3}$ were present but free oxygen was not present in significant amount.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.