Question

Acid rain occurs when ph value of rainwater is less than

Answer 1

less than 5.6
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Answer 2

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Normal, clean rain has a pH value of between 5.0 and 5.5, which is slightlyacidic. However, when rain combines with sulfur dioxide or nitrogen oxides—produced from power plants and automobiles—the rain becomes much more acidic. Typical acid rain has a pH value of 4.0.


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