INSIGHT UPSC QUIZ

Science & Technology General Science
Q.

Consider the following statements about ‘Acid Rain’: 

1. Oxides of sulphur and nitrogen are major contributors to acid rain.

2. Acid rain is good for agriculture as it provides nitrogen for the growth of plants.

3. When acid rain flows into the river, it increases the pH level of river water. 

Which of the statements given above is/are correct?

Explanation:

ANSWER: (A)

Acid Rain

  • Normally rain water has a pH of 5.6 due to the presence of H+ ions formed by the reaction of rain water with carbon dioxide present in the atmosphere. When the pH of the rain water drops below 5.6, it is called acid rain. 
  • Acid rain is a by-product of a variety of human activities that emit the oxides of sulphur and nitrogen in the atmosphere. (Thus, Statement 1 is correct)
  • Acid rain is harmful for agriculture, trees and plants as it dissolves and washes away nutrients needed for their growth. (Thus, Statement 2 is not correct)
  • When acid rain flows into the rivers, it lowers the pH of the river water. The survival of aquatic life in such rivers becomes difficult. (Thus, Statement 3 is not correct)

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