What is the most commonly known CFC refrigerant?

What is the most commonly known CFC refrigerant?

• A. R-134a
• B. R-22
• C. R-12
• D. R-410A

Answer: (C)

CFC refrigerants are ozone-depleting chlorofluorocarbons, and the most famously known among them is R-12. R-12, or dichlorodifluoromethane, was widely used in older automotive and residential air conditioning and became the stereotype example of a CFC due to its long-standing or iconic presence in systems before ozone protection regulations. Other options are not CFCs: R-22 is an HCFC (it contains chlorine but is classified separately from CFCs), and R-134a and R-410A are HFCs or blends that do not contain chlorine. Thus, R-12 is the best answer because it is the classic, widely recognized CFC refrigerant.

CFC refrigerants are ozone-depleting chlorofluorocarbons, and the most famously known among them is R-12. R-12, or dichlorodifluoromethane, was widely used in older automotive and residential air conditioning and became the stereotype example of a CFC due to its long-standing or iconic presence in systems before ozone protection regulations. Other options are not CFCs: R-22 is an HCFC (it contains chlorine but is classified separately from CFCs), and R-134a and R-410A are HFCs or blends that do not contain chlorine. Thus, R-12 is the best answer because it is the classic, widely recognized CFC refrigerant.