Four solutions have pH values 1, 4, 8 and 13. Which one is the most acidic?
Answer and explanation
Correct answer: Solution with pH 1
Acidity increases as pH decreases because a lower pH corresponds to a greater concentration of hydrogen ions. Among the values 1, 4, 8 and 13, pH 1 is the lowest, so it indicates the most acidic solution and option D is correct. pH 4 is also acidic but weaker than pH 1, pH 8 is basic, and pH 13 is strongly basic.
Frequently asked questions
What is the correct answer to this question?
Solution with pH 1
Why is this the correct answer?
Acidity increases as pH decreases because a lower pH corresponds to a greater concentration of hydrogen ions. Among the values 1, 4, 8 and 13, pH 1 is the lowest, so it indicates the most acidic solution and option D is correct. pH 4 is also acidic but weaker than pH 1, pH 8 is basic, and pH 13 is strongly basic.
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.
