In the field of defense and explosives, it is essential to have a clear understanding of various explosive materials. This question aims to identify which among the given options is not an explosive substance.


Among the options provided, option D - Nitrochloroform is not an explosive substance. Let's discuss the properties and uses of the other options:

a) Trinitrotoluene (TNT)
- TNT is a well-known explosive compound.
- It is yellow in color and has a high detonation velocity.
- TNT is commonly used as an explosive in military applications, mining, and demolition.
- It is highly stable and relatively safe to handle.

b) Trinitroglycerine
- Trinitroglycerine, also known as nitroglycerin, is a highly explosive liquid compound.
- It is primarily used in the production of dynamite, a widely used explosive.
- Trinitroglycerine is sensitive to shocks, heat, and friction, making it highly dangerous to handle.

c) Cyclotrimethylene Trinitramine (RDX)
- RDX is a powerful high explosive compound.
- It is commonly used in military applications, such as in the manufacturing of plastic explosives, detonators, and propellants.
- RDX is highly stable and can withstand high temperatures and shocks.

d) Nitrochloroform
- Nitrochloroform, also known as chloropicrin, is not an explosive compound.
- It is a yellowish liquid with a pungent odor and is primarily used as a pesticide, fumigant, and tear gas.
- While it can be irritant and toxic, it does not possess the explosive properties of the other options.


In conclusion, among the given options, option D - Nitrochloroform is not an explosive substance. It is important to have a clear understanding of these materials to ensure safe handling and storage in the field of defense and explosives.