Previous Year Question

In the context of school-level chemistry, the common element in acids is hydrogen. Acids produce hydrogen ions (H⁺) in aqueous solution, and these ions are responsible for their acidic character.

For example:

HCl → H⁺ + Cl⁻
HNO₃ → H⁺ + NO₃⁻

However, merely containing hydrogen does not make a compound an acid. Substances such as glucose and alcohol contain hydrogen but do not produce H⁺ ions in aqueous solution in the manner acids do.