Discussion
Which of the following is NOT a synthetic refrigerant in the refrigeration cycle?
Answer: C
Propane (R290) is not a synthetic refrigerant. It is a natural hydrocarbon found in natural gas and petroleum, and it is used as a natural refrigerant. Hydrofluorocarbons (HFCs), perfluorocarbons (PFCs) and chlorofluorocarbons (CFCs) are all man-made halogenated compounds produced for refrigeration and other uses, so they are synthetic refrigerants.
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