Which of the following is an example of a strong acid?
Answer and explanation
Correct answer: Hydrochloric acid
The governing concept is the extent of ionisation in water. A strong acid ionises almost completely and produces a high concentration of hydrogen or hydronium ions. Hydrochloric acid, HCl, is therefore a strong acid, so option A is correct. Acetic acid in vinegar, carbonic acid, and citric acid ionise only partially and are commonly classified as weak acids. Strength refers to ionisation, not merely to the amount of acid present.
Frequently asked questions
What is the correct answer to this question?
Hydrochloric acid
Why is this the correct answer?
The governing concept is the extent of ionisation in water. A strong acid ionises almost completely and produces a high concentration of hydrogen or hydronium ions. Hydrochloric acid, HCl, is therefore a strong acid, so option A is correct. Acetic acid in vinegar, carbonic acid, and citric acid ionise only partially and are commonly classified as weak acids. Strength refers to ionisation, not merely to the amount of acid present.
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.
