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.

Hi there!

If a substance is organic, it burns rapidly.

Since, for example, carbon is organic matter, it has chemical reactions and burns when having contact with oxygen (creating carbon dioxide). 
Similarly, many organic matter burns when having a reaction. 

Hope this helps!