Jaleel is determining whether an unknown substance is organic or inorganic. Which positive test verified the substance was organic? It was solid at room temperature. It conducted electricity. It dissolved in water. It burned rapidly.

The positive test that verified the substance as organic is that "it burned rapidly." Organic substances are primarily made up of carbon compounds. They may also contain hydrogen, oxygen, nitrogen, sulfur, phosphorus, and other elements. One of the defining characteristics of many organic substances is that they can combust or burn in the presence of oxygen, giving off carbon dioxide and water as a result.

Extra: Organic chemistry is the study of the structure, properties, composition, reactions, and synthesis of organic compounds that contain carbon atoms. The presence of carbon-hydrogen bonds is a distinctive feature of organic molecules. The combustion of organic substances is a chemical reaction where organic compounds react with oxygen to release energy in the form of heat and light, producing carbon dioxide and water. Inorganic compounds, on the other hand, do not generally contain carbon-hydrogen bonds, and they have different properties and reactions compared to organic compounds. They might be salts, metals, and other compounds like carbonates and oxides that typically do not burn easily. While a substance being solid at room temperature, conducting electricity, or dissolving in water might apply to both organic and inorganic substances, burning rapidly indicates a high likelihood of the substance being organic.