Discussion
Halogenated hydrocarbons are the preferred refrigerants for household refrigerators and air conditioning. From the following, select the correct matching of halogenated hydrocarbon and their example.
Answer: C
The correct match is \(HFC_{s}\)- R-134.
R-134a (tetrafluoroethane) is a hydrofluorocarbon (HFC): it contains hydrogen, fluorine and carbon but no chlorine, so it does not deplete ozone, and it replaced R-12 in household refrigerators and car air conditioners.
The other pairs are mismatched. R-22 is an HCFC (chlorodifluoromethane), not a CFC, and R-12 is a CFC (dichlorodifluoromethane), not an HCFC. 'HCFs' is not a refrigerant class, and R-18 is not a standard refrigerant number.
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