Question:
If pH of rain water is less than ____ ,then it is called acid rain.
If pH of rain water is less than ____ ,then it is called acid rain.
Updated On: Apr 16, 2025
- 5.6
- 7.6
- 6.6
- 8.6
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The Correct Option is A
Solution and Explanation
Rainwater is naturally slightly acidic with a pH of about 5.6 due to dissolved carbon dioxide forming carbonic acid. If the pH of rainwater is lower than 5.6, it is considered acid rain, which can be caused by pollutants like sulfur dioxide and nitrogen oxides.
Thus, the correct answer is 5.6.
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