Evolution Question 51
51. 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
Show Answer
Answer : b
Hints & Solution
(b) According to Oparin, the atmosphere of primitive earth was reducing because its atoms were most numerous and most reactive. Free oxygen was not present in significant amount. Large quantities of $H_2, N_2$, water vapour, $CO_2$, $CH_4$ and $NH_3$ were present.
