AI-generated practice question — model-generated for extra practice, not a previous-year CBSE board question.
The symbol (aq) (aqueous) is used for a substance dissolved in water in a chemical equation.
"aq" stands for aqueous. Examiners expect the symbol (aq) and the word "aqueous." Don't confuse it with (l) for liquid — water itself as a liquid is (l), but anything dissolved in water is (aq). Source: Chapter 1, Section 1.1.2.