Name a common incompatibility to avoid storing together.

• A. Oxidizers with fuels or acids with energetic materials.
• B. Water with oil.
• C. Inert gases with oxidizers.
• D. Salt with metal.

Answer: (A)

The main idea here is that certain materials react dangerously when kept together, so you must keep them segregated to prevent accidental, violent outcomes. Oxidizers are substances that provide the oxygen needed for combustion. When an oxidizer is stored next to fuels or energetic materials, a heat source or friction can start a reaction that is rapidly accelerated by the available oxygen, potentially turning a small incident into a large, explosive fire. Acids can destabilize energetic materials and promote rapid decomposition, again increasing the risk of a violent reaction when kept in proximity. That’s why avoiding storage of oxidizers with fuels and acids with energetic materials is a fundamental safety rule.

The other options don’t reflect the same level of direct, high-risk incompatibility. Water with oil is a common spill hazard but not a primary incompatibility concern in storage. Inert gases with oxidizers don’t create a reactive pairing, and salt with metal is more about corrosion and contamination than an immediate energetic reaction.