Which liquid has the highest explosive range?

Ethanol has the highest explosive range relative to the other options listed. The explosive range refers to the concentration of a vapor in the air that can ignite and lead to an explosion. Ethanol's vapor can mix with air in a wider range of concentrations than gasoline, acetone, or kerosene, making it more volatile and more likely to reach an explosive mixture when in the presence of an ignition source.

This property makes ethanol a significant concern in terms of safety because its explosive potential can occur more easily under various conditions. When considering safety protocols and fire responses, understanding the explosive range of substances like ethanol is essential for firefighters, as it can inform decisions on how to handle spills and potential ignition sources effectively.