Question

Below which of the following pH is rain regarded as ‘acid rain’?

• A. 7
• B. 7.3
• C. 5.6
• D. 6

Answer 1

Answer:

C. 5.6

Though the pH of neutral water is 7, rain water is acidic due to mixing up with atmospheric carbon dioxide and is said to have a 5.6 pH. Hence acid rain has a pH less than 5.6.