One reason that explosives are so dangerous is that they contain both a ____________ and a ____________ component.

• A. Solvent and a catalyst
• B. Oxidizer and a fuel
• C. Fuel and inert gas
• D. Oxidant and an acid

Answer: (B)

Explosives are dangerous because energy comes from a rapid reaction between a fuel and an oxidizer that are built into the material itself. The oxidizer provides the oxygen needed for the fuel to burn extremely fast, so the reaction can proceed without needing atmospheric oxygen. This intimate, fast-onset combination releases a huge volume of hot gases in a split second, creating the powerful blast and fragmentation associated with explosions. The other options don’t describe this key pairing—solvent and catalyst don’t define the explosive energy source, a fuel with an inert gas lacks the necessary oxidizer, and an oxidant paired with an acid isn’t the typical energetic arrangement. Therefore, the correct pairing is an oxidizer with a fuel.