Give a representative dangerous mixing scenario.

• A. Mixing water and a metal surface
• B. Mixing an inert gas with air
• C. Mixing a salt with sugar
• D. Mixing a strong oxidizer with an organic solvent can cause violent oxidation and heat release

Answer: (D)

Mixing reactive ingredients that can undergo rapid, uncontrolled oxidation is the representative dangerous mixing scenario. A strong oxidizer with an organic solvent is a classic example because the oxidizer readily supplies oxygen while the organic solvent is a potential fuel. When they meet, the reaction can proceed extremely fast, releasing a lot of heat. That heat can drive the reaction rate up further in a runaway loop, leading to ignition, fire, or even an explosion, especially if confinement or pressure buildup is involved. This is a fundamental warning in chemical safety: keep oxidizers separate from organic solvents and ensure proper storage, segregation, and handling to prevent such violent reactions.

The other options don’t illustrate this same high-risk mixing: water on a metal surface can be hazardous for very reactive metals but isn’t a universal dangerous mixing scenario; an inert gas with air isn’t reactive; a salt with sugar is generally inert.