Which oxidizing gas is NOT commonly associated with chemical reactions?

Arynic is not a commonly recognized oxidizing gas in chemical reactions. Chlorine, fluorine, and bromine are all halogens known for their strong oxidizing properties and are frequently involved in various chemical reactions. Chlorine is widely used in bleaching and disinfecting, fluorine is known for its reactivity and used in various applications, including the production of fluorinated compounds, and bromine is used in flame retardants and as an antiseptic. On the other hand, "arynic" does not refer to a recognized oxidizing agent or gas in the same context, making it the correct answer as it is less associated with oxidative reactions compared to the other choices.