Question: which gases are used in refrigerator for cooling?
Answer: R-22 Chlorofluorocarbons. This gas is common in older refrigerators, but was ozone-depleting and thus phased out. ... 
R-134A Tetrafluoroethane. This gas can currently be seen in the refrigerator. ... 
R-438A Freon. ... 
R-600A Iso Butane. ... 
Tetrafluoroethane. ... 
Chlorofluorocarbon. ... 
Polystyrene. ... 
Acrylonitrile.