Which of the following substances produces hydrogen ions (H⁺) when dissolved in water?
Answer and explanation
Correct answer: Acid
According to the aqueous theory of acids and bases, an acid ionises or reacts with water to increase the concentration of hydrogen ions, written as H⁺ in school-level chemistry. Hence option A is correct. A base generally increases hydroxide ions, OH⁻, while a salt dissociates into its constituent ions and an indicator mainly changes colour to show acidity or basicity.
Frequently asked questions
What is the correct answer to this question?
Acid
Why is this the correct answer?
According to the aqueous theory of acids and bases, an acid ionises or reacts with water to increase the concentration of hydrogen ions, written as H⁺ in school-level chemistry. Hence option A is correct. A base generally increases hydroxide ions, OH⁻, while a salt dissociates into its constituent ions and an indicator mainly changes colour to show acidity or basicity.
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.
