Question

. When the RH of the rain water drops
below s. 6 it is called ​

Answer 1

Answer:

Normal rain water is slightly acidic with a pH range of 5-6. When the pH level of rain water falls below this range, it becomes acid rain. It can have harmful effects on plants, aquatic animals and infrastructure

Explanation:

Answer 2

Answer:

the rain water whose pH is below 6 they are called 'acid rain'