Liquid nitrogen should always be stored in a sealed leak-proof container.

• A. True
• B. False
• C. Not applicable
• D. Depends on usage

Answer: (B)

Liquid nitrogen boils and turns into gas even at cryogenic temperatures. That gas must escape to prevent pressure from building up inside the container. Storage dewars are designed with vents or pressure-relief systems and are not truly sealed. If you tried to keep LN2 in a sealed container, the expanding gas could over-pressurize and cause the container to fail, creating safety hazards. So, storing liquid nitrogen in a sealed leak-proof container is not appropriate; it should be kept in vented cryogenic dewars.