Question

Acid rain is formed, when pH of rainwater is____.

• A. More than 7
• B. More than 6
• C. Less than 2
• D. Less than 5.6

Answer 1

The correct option is D

Less than 5.6

When pH of rainwater is less than 5.6, it is called acid rain. When acid rain flows into the rivers, it lowers the pH of the river water.