A student says that pH zero means there is no acid. What is the correct evaluation?
Answer and explanation
Correct answer: The statement is wrong because very low pH shows very high acidity
The governing concept is the pH scale, which indicates hydrogen-ion concentration: pH = −log[H+]. Lower pH values correspond to greater hydrogen-ion concentration and stronger acidity. Therefore pH 0 represents a highly acidic solution, not the absence of acid, so option A is correct. Neutrality is approximately pH 7, while pH values above 7 generally indicate basic solutions; pH is used for both acids and bases.
Frequently asked questions
What is the correct answer to this question?
The statement is wrong because very low pH shows very high acidity
Why is this the correct answer?
The governing concept is the pH scale, which indicates hydrogen-ion concentration: pH = −log[H+]. Lower pH values correspond to greater hydrogen-ion concentration and stronger acidity. Therefore pH 0 represents a highly acidic solution, not the absence of acid, so option A is correct. Neutrality is approximately pH 7, while pH values above 7 generally indicate basic solutions; pH is used for both acids and bases.
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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