What is the usual pH of acid rain?
Answer and explanation
Correct answer: Less than 5.6
Acid rain has a pH below 5.6. Normal rain can have a pH of about 5.6 because dissolved carbon dioxide forms a weak acid. Acids formed from sulphur dioxide and nitrogen oxides lower the pH further. A pH of 7 is neutral, so option B does not represent acid rain.
Frequently asked questions
What is the correct answer to this question?
Less than 5.6
Why is this the correct answer?
Acid rain has a pH below 5.6. Normal rain can have a pH of about 5.6 because dissolved carbon dioxide forms a weak acid. Acids formed from sulphur dioxide and nitrogen oxides lower the pH further. A pH of 7 is neutral, so option B does not represent acid rain.
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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