Question

The primordial atmosphere of the primitive earth contained the following substances :

• A. $H_2$
• B. Water vapour
• C. $N{H}_3$
• D. $C{H}_4$

Answer 1

Answer: (A), (B), (C), (D)

The correct options are
A

$H_2$

B

Water vapour

C

$N{H}_3$

D

$C{H}_4$

Earth was formed approximately 4.5 billion years ago. As it cooled down, a primitive atmosphere was created by the outgassing of early volcanoes. The early atmosphere contained no oxygen and could not support most of the life forms. In addition to the molten lava flowing into the ocean, some of the chemicals viz., $H_2$, $C{H}_4$, $N{H}_3$, $C{O}_2$ and water vapourwere supposedly washed down by the rains into the ocean where these chemicals gradually converted to simple organic molecules that eventually joined together into complex organic molecules like DNA and RNA.