Why is the pH of acid rain lower than that of normal rain?
Answer and explanation
Correct answer: It contains acids formed from acidic oxides
Acid rain forms when acidic oxides, mainly sulfur dioxide and nitrogen oxides, dissolve in atmospheric moisture and produce acids such as sulfurous, sulfuric, or nitric acid. These acids increase the hydrogen-ion concentration of rainwater, and pH decreases as hydrogen-ion concentration increases. Therefore acid rain has a lower pH than normal rain. Common salt or absence of dissolved gas does not explain the acidity.
Frequently asked questions
What is the correct answer to this question?
It contains acids formed from acidic oxides
Why is this the correct answer?
Acid rain forms when acidic oxides, mainly sulfur dioxide and nitrogen oxides, dissolve in atmospheric moisture and produce acids such as sulfurous, sulfuric, or nitric acid. These acids increase the hydrogen-ion concentration of rainwater, and pH decreases as hydrogen-ion concentration increases. Therefore acid rain has a lower pH than normal rain. Common salt or absence of dissolved gas does not explain the acidity.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: Chemical Substances – Nature and Behaviour. Topic: Acids, Bases, and Salts.
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