Which of the following is an example of a strong acid?

Sulfuric acid is classified as a strong acid because it completely dissociates in water, releasing all of its hydrogen ions (H⁺) into the solution. This complete ionization is what defines strong acids—they produce a high concentration of hydrogen ions, leading to a lower pH level and a greater acidity of the solution.

In contrast, ethanoic acid, citric acid, and carbonic acid are considered weak acids. These acids do not fully dissociate and only a fraction of their molecules release hydrogen ions when dissolved in water. As a result, they do not generate the same level of acidity as strong acids like sulfuric acid. Understanding this distinction between strong and weak acids is crucial for predicting their behavior in chemical reactions and their applications in various contexts.