R11 and R-123 refrigerants are categorized as?

R-11 and R-123 refrigerants are indeed categorized in multiple ways, which is why the correct answer encompasses all categories listed.

Both R-11 and R-123 are classified as high-temperature refrigerants because they can operate effectively at higher heat ranges in vapor compression refrigeration systems. This characteristic makes them suitable for use in applications that require higher temperature operation, such as chillers and air conditioning systems.

Furthermore, these refrigerants fall under the category of chlorofluorocarbons (CFCs) and hydrochlorofluorocarbons (HCFCs). R-11 is a CFC, while R-123 is an HCFC. This classification is particularly important because it relates to environmental regulations regarding ozone depletion. CFCs and HCFCs are known for their potential to deplete the ozone layer, prompting global initiatives to phase them out.

Lastly, both R-11 and R-123 are also identified as low-pressure refrigerants because they operate at lower pressures compared to many other refrigerants used in similar applications. This attribute influences the design and operation of refrigeration systems, as it affects the efficiency and safety of the equipment.

Therefore, all the characteristics presented in the choices align with the properties of R-11