Chlorine
The gas commonly used in gas sterilization is ethylene oxide (EtO).
Sarin
You don't put gas into gas masks. They are used to keep out poisonous gases.
It sounds as if you are thinking of the Sonderkommandosor 'special squads' that were forced to move corpses from the gas chambers to to the crematoria.
A gas chamber is an apparatus for killing humans or animals with gas, consisting of a sealed chamber into which a poisonous or asphyxiant gas is introduced. The most commonly used poisonous agent is hydrogen cyanide; carbon dioxide and carbon monoxide have also been used. Gas chambers were used as a method of execution for condemned prisoners in the United States beginning in the 1920s. During the Holocaust, large-scale gas chambers designed for mass killing were used by Nazi Germany as part of their genocide program, and also by the Independent State of Croatia at the Jasenovac concentration camp.[1] The use of gas chambers has also been reported in North Korea.[2]Gas chambers have also been used for animal euthanasia, using carbon monoxideas the lethal agent. Sometimes a box filled with anaesthetic gas is used toanaesthetize small animals for surgery or euthanasia.
The name of a green choking gas used for killing germs in water is chlorine. This is most commonly used in drinking water and swimming pools.
gases were used by pitting Jews in gas chambers then putting gas in it and killing them
It is often used in pools to kill both algae and bacteria that is produced.
Chlorine
Gas Vesicles
Nitrogen
Chlorine, with formula Cl2.
This gas is hydrogen sulfide, H2S.
Neon gas is used in refrigerators.
Chlorine is used to kill bacteria in swimming pools. It's the same thing used to clean your drinking water.
Bio gas is produced by the dung it is mixed to some bacteria and used for the fuel.
nitrogen