A. HFCs are indeed organic compounds containing fluorine and hydrogen atoms. They were widely adopted as replacements for ozone-depleting substances like CFCs and HCFCs in various applications, including refrigeration and air conditioning. Statement A is correct. B. HFCs have minimal or zero Ozone Depletion Potential (ODP) because they do not contain chlorine or bromine atoms, which are the main culprits behind ozone depletion. CFCs and HCFCs, containing chlorine, were much more harmful to the ozone layer. Thus, HFCs do not harm the ozone layer as much as CFCs (effectively, they don't harm it at all compared to CFCs). Statement B is correct. C. HFCs do cause global warming. They are potent greenhouse gases with high Global Warming Potential (GWP), often thousands of times greater than carbon dioxide (CO2) over a 100-year period. This is the reason why the Kigali Amendment to the Montreal Protocol aims to phase them down, despite being ozone-friendly. Statement C is incorrect.
Which of these are true about Hydrofluorocarbons (HFCs)?
Asked in KPSC KAS Prelims 2015 · Topic: Greenhouse Effect and Climate Change (Composition, Sources, and Radiative Forcing of Major Greenhouse Gases (GHGs))
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Answer: A. HFCs, organic compounds that contain fluorine and hydrogen atoms, are com‐ monly used in refrigerators and air-condi‐ tioners in place of chlorofluorocarbons (CFCs).
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