Which of the following is an example of an explosive material?

• A. Ammonia
• B. Hydrogen
• C. Dynamite
• D. Acetylene

Answer: (C)

An explosive material is a substance designed to release energy rapidly, creating a shock wave and a large volume of gas in a very short time. Dynamite fits this definition because it is a manufactured explosive—nitroglycerin stabilized in an absorbent material—intended to detonate under controlled conditions. This rapid energy release is what characterizes an explosive material.

The other options are not considered explosive materials in the same sense. Ammonia is a toxic gas used mainly as a fertilizer and has health hazards rather than an energetic detonation. Acetylene is a highly flammable fuel gas used for welding; while it can contribute to an explosion if confined with air, it is not an explosive compound itself. Hydrogen is another highly flammable gas that can explode, but it is a fuel gas rather than an engineered explosive material like dynamite.