Which of the following is the most commonly used inerting gas?

The most commonly used inerting gas is nitrogen. It is often chosen for inerting processes because it is abundant, inexpensive, and non-toxic. Nitrogen works effectively to displace oxygen in environments where flammable materials are present, thereby reducing the risk of combustion. Its application spans various industries, from chemical manufacturing to food preservation, where maintaining an inert atmosphere is critical for safety and product quality.

Inerting with nitrogen is particularly effective because it does not react with other substances, making it a safe choice for various operational settings. Its physical properties, such as being colorless and odorless, add to its versatility and ease of use in numerous applications where the control of oxygen levels is essential.