As the pH value becomes lower, what happens to the acidity of a solution?
Answer and explanation
Correct answer: It increases
The pH scale is related logarithmically to hydrogen-ion concentration: pH = −log[H⁺]. Therefore, when pH decreases, the hydrogen-ion concentration increases and the solution becomes more acidic. Option A is correct. A lower pH does not make acidity zero or neutral; option B reverses the relationship, and option D describes pH near seven rather than a lower pH.
Frequently asked questions
What is the correct answer to this question?
It increases
Why is this the correct answer?
The pH scale is related logarithmically to hydrogen-ion concentration: pH = −log[H⁺]. Therefore, when pH decreases, the hydrogen-ion concentration increases and the solution becomes more acidic. Option A is correct. A lower pH does not make acidity zero or neutral; option B reverses the relationship, and option D describes pH near seven rather than a lower pH.
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.
