What is the flammable range of kerosene?

The flammable range of a substance is defined as the percentage of vapor in the air that can ignite, creating a fire hazard. For kerosene, this range is between 0.7% and 5%. This means that in this concentration, if an ignition source is introduced, combustion can occur.

The importance of this range lies in fire safety and risk assessment; knowing it helps in managing the storage and handling of kerosene to prevent fires. Concentrations below 0.7% are too lean to ignite, and concentrations above 5% are too rich, meaning there is not enough oxygen for combustion to occur effectively. Understanding the precise flammable range aids first responders and safety professionals in making informed decisions regarding fire prevention and response. The options provided that fall outside this defined range reflect either an underestimation or overestimation of kerosene's flammability, making them incorrect in this context.