Consider the following statements: Statement-I: Rainfall is one of the reasons for weathering of rocks. Statement-II: Rain water contains carbon dioxide in solution. Statement-III: Rain water contains atmospheric oxygen. Which one of the following is corr

examrobotsa's picture

Submitted by examrobotsa on

Q: 15 (IAS/2024)
Consider the following statements:
Statement-I:
Rainfall is one of the reasons for weathering
of rocks.
Statement-II:
Rain water contains carbon dioxide in
solution.
Statement-III:
Rain water contains atmospheric oxygen.
Which one of the following is correct in
respect of the above statements?

question_subject: 

Geography

question_exam: 

IAS

Rainfall contributes to rock weathering through chemical reactions involving dissolved carbon dioxide forming weak carbonic acid. Oxygen in rainwater also plays a role in physical and chemical weathering, leading to rust and other forms of degradation, but Statement-II is the primary explanation for chemical weathering.