Why are non-flammable gases used in cryogenic applications?

Non-flammable gases are used in cryogenic applications primarily to maintain extremely low temperatures for various processes. These gases, such as nitrogen and helium, have properties that allow them to remain in a gaseous state at very low temperatures, making them suitable for applications that involve cooling or freezing materials.

Their non-flammable nature is particularly important in cryogenics because it minimizes safety risks associated with fire hazards, especially when dealing with ultra-low temperatures and potential ignition sources. Maintaining extremely low temperatures is essential in a range of processes, including scientific research, medical applications, and industrial operations, where precise thermal management is crucial.

While the other options mention related concepts, such as producing solid gas or increasing reactivity, they do not pertain directly to the primary purpose of non-flammable gases in cryogenic processes, which is focused on stable, ultra-low temperature environments.