Volatile solvents over one liter must be stored in the laboratory in explosion-proof containers.

• A. True
• B. False
• C. Not specified
• D. Only if labeled

Answer: (B)

The important idea here is how to reduce ignition risk from flammable liquids. Volatile solvents should be kept in an approved flammable‑liquid storage cabinet, not in explosion‑proof containers. Explosion‑proof enclosures are designed to contain internal explosions or resist ignition in hazardous atmospheres, but they are not the standard requirement for storing solvents, and there isn’t a universal rule that volumes over a liter must be kept in such containers. The safer, typical practice is to store solvents in a proper flammable cabinet with proper labeling and segregation from incompatible materials, and to minimize the amount stored and kept away from heat or ignition sources.