Which one of the following is not a High Intensity Explosive ?

Explosives are generally categorized into two types: High Explosives and Low Explosives. High explosives, such as TNT (Trinitrotoluene), RDX (Research Department Explosive), and Plastic explosives (which typically use RDX or PETN as their base), undergo detonation. This means the chemical reaction propagates as a supersonic shockwave, resulting in high-intensity shattering power.

In contrast, Black gunpowder is classified as a Low Explosive. It undergoes deflagration, a process where the substance burns rapidly at subsonic speeds through heat transfer. Because it lacks the supersonic detonation wave characteristic of high explosives, it is not considered a high-intensity explosive and is primarily used as a propellant or in pyrotechnics.