According to Oparin, which one of the following was not present in the primitive atmosphere of the earth?

Step-by-step solution

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 , water vapour CO ₂, CH ₄ and NH ₃ were present, but free oxygen was not present in significant amount. Related Theory Oparin and Haldane suggested that life originated from non-living organic molecules like proteins and RNA. This was followed by the theory of chemical evolution which suggested that atmospheric conditions of earth led to the formation of organic mol