Why is acid rain considered more harmful than normal rain?
Answer and explanation
Correct answer: Its pH is very low
The governing concept is the pH scale: a lower pH indicates a higher concentration of hydrogen ions and therefore greater acidity. Acid rain forms when pollutants such as sulphur and nitrogen oxides produce acids in atmospheric moisture, making its pH lower than ordinary rain. Hence option A is correct. A pH of 14 is strongly basic, and acid rain is not always basic or free from dissolved substances.
Frequently asked questions
What is the correct answer to this question?
Its pH is very low
Why is this the correct answer?
The governing concept is the pH scale: a lower pH indicates a higher concentration of hydrogen ions and therefore greater acidity. Acid rain forms when pollutants such as sulphur and nitrogen oxides produce acids in atmospheric moisture, making its pH lower than ordinary rain. Hence option A is correct. A pH of 14 is strongly basic, and acid rain is not always basic or free from dissolved substances.
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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