Which property is true regarding Nitrogen (N)?

Nitrogen is classified as a nonflammable gas, making it a safe choice for various applications, particularly in medical settings where the risk of fire needs to be minimized. This property is crucial because it allows nitrogen to be used as an inert gas in processes where a non-reactive environment is required, such as in the preservation of sensitive materials or in flushing out containers to prevent explosive mixtures of gases.

The inert nature of nitrogen is a vital characteristic in medical gas applications, as it does not engage in combustion or support fire, making it an excellent choice in environments where flammable gases are present. This property also helps prevent accidental fires when nitrogen is used for purging equipment or in storage scenarios.

In contrast, the other properties listed do not apply to nitrogen. It does not support life by itself, as it is an inert gas and does not participate in biological processes necessary for sustaining life. Additionally, nitrogen is not highly flammable or strongly reactive, further distinguishing it as a safe and stable gas for various applications in healthcare and industry.