Which of the following components is not part of R-152a refrigerant?

R-152a is a refrigerant that is classified as a hydrofluorocarbon (HFC). Its chemical composition includes fluorine, hydrogen, and carbon. Specifically, the formula for R-152a is C2H4F2, indicating that it contains two carbon atoms, four hydrogen atoms, and two fluorine atoms.

The presence of chlorine in a refrigerant such as R-152a would categorize it as a hydrochlorofluorocarbon (HCFC) or a chlorofluorocarbon (CFC). Both HCFCs and CFCs have been phased out or are being phased out under international agreements like the Montreal Protocol due to their ozone-depleting potential. R-152a, on the other hand, does not contain chlorine, making it more environmentally friendly compared to refrigerants that do.

Therefore, since R-152a is made up of fluorine, hydrogen, and carbon but does not include chlorine in its molecular structure, this makes the identification of chlorine as a non-component of R-152a accurate.