Which of the following is considered a property of a combustible liquid?

A combustible liquid is characterized by its ability to ignite and sustain combustion when exposed to a sufficient heat source. One of the defining properties of such a liquid is its flash point, which is the lowest temperature at which it can form an ignitable mixture with air.

A low flash point indicates that a liquid can easily ignite at lower temperatures, making it more hazardous in a fire or combustion scenario. For combustible liquids, a low flash point typically signifies that they can pose a significant risk in terms of flammability, further emphasizing their potential danger in various environments.

In contrast, options like non-evaporative, high flash point, and neutral pH do not directly relate to the combustibility of a liquid. Non-evaporative would imply that the liquid is less likely to form vapors, which contradicts the properties of many combustible liquids. A high flash point suggests that the liquid is less likely to ignite easily, and a neutral pH is not indicative of flammability. Therefore, the identification of a low flash point as a property of combustible liquids is essential for understanding their risk and behavior in practical applications.