Which of the following is an example of HFC type refrigerants?

The example of HFC (Hydrofluorocarbon) type refrigerants is R-134a. This refrigerant is recognized as an HFC due to its chemical composition and properties. HFCs are commonly used in refrigeration and air conditioning applications, primarily because they have lower ozone-depleting potential compared to the earlier refrigerants that contain chlorine, such as CFCs (like R-12) and HCFCs (like R-22).

R-134a is a popular choice because it does not harm the ozone layer and has better thermodynamic properties for use in various cooling applications. Additionally, R-134a has been widely adopted to replace R-12 in many systems, especially in automotive air conditioning.

The other refrigerants listed, such as R-12 and R-11, are classified as CFCs, while R-22 is classified as an HCFC. Both CFCs and HCFCs contain chlorine, which is responsible for ozone depletion, making them less favorable under international environmental agreements.