Question

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.

Answer 1

Hey there!

The correct answer to your question is the last option.

The positive test that verified the substance is organic is "it burned rapidly."
Organic means to be live, and also provide carbon. Carbon is a chemical element, and it also forms an organic compound. Therefore, the answer is option "D."

Hope this helps you.
Have a great day!

Answer 2

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!