Sponsor Area

Evolution

Question
CBSEENBI12047458

Which of these gases was/were present in prebiotic atmosphere?

  • Ammonia

  • Methane

  • Oxygen

  • Hydrogen

Solution

A.

Ammonia

B.

Methane

D.

Hydrogen

Primitive atmosphere contained gases like CO2, CO, N, H2, NH3, etc. Water vapour and metallic carbites reacted to form CH4. There was no oxygen present at that time. With the addition of O2 in the atmosphere, it became oxidising in nature and CH4 and NH3 began to disappear as they got oxidised forming CO2 and N2 respectively.