Question

76. Arrange the stages involved in the evolution of the present atmosphere in chronological order

• A. A. 1-2-3
  
• B. B. 3-1-2
  
• C. C. 1-3-2
  
• D. D. 3-2-1

Answer 1

The correct option is B B. 3-1-2


Ans: B
There are three stages in the evolution of the present atmosphere. The first stage is marked by the loss of primordial atmosphere. In the second stage, the hot interior of the earth contributed to the evolution of the atmosphere. Finally, the composition of the atmosphere was modified by the living world through the process of photosynthesis.