Question

pH of acid rain is ______.

Options

• 5.6–6.5

• about 4

• 6.5–7

• approximately 1

Answer 1

pH of acid rain is about 4.

Explanation:

Rain in industrialised areas affected by acid rain can have a pH of about 4 or lower. Unpolluted rain is mildly acidic, around pH 5.6–6.5, while pH 1 is far too acidic for the typical value asked.