Refrigerant Freon - 12 belongs to

Explanation:

R-12, Dichloro-difluoro-methane (CCI₂F₂).

• The R-12 is a very popular refrigerant. It is a colorless, almost odorless liquid with a boiling point of -29°C at atmospheric pressure.
• It is non-toxic, non-corrosive, non-irritating, and non-flammable.
• It has a relatively low latent heat value which is an advantage in small refrigerating machines.
• A large amount of refrigerant circulated will permit the use of less sensitive and more positive operating and regulating mechanisms.
• It operates at a low but positive head and backpressure and with good volumetric efficiency.
• This refrigerant is used in many different types of industrial and commercial applications such as refrigerators, freezers, water coolers, room and window air-conditioning units, etc.
• Its principal use is found in reciprocating and rotary compressors, but its use in centrifugal compressors for large commercial air-conditioning is increasing.