Question
Download Solution PDFWhich of the following chemicals replaced chlorofluorocarbons (CFCs) after their phase out due to Montreal Protocol?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFHydrochlorofluorocarbons (HCFCs) replaced chlorofluorocarbons (CFCs) after their phase out due to Montreal Protocol.
Key Points
- Chlorofluorocarbons (CFCs) are a group of synthetic organic compounds that were widely used as refrigerants, solvents, and propellants in aerosol cans.
- They were found to be responsible for the depletion of the ozone layer and were phased out under the Montreal Protocol of 1987.
- To replace CFCs, a number of alternative chemicals were developed.
- One of the most common replacements for CFCs was hydrochlorofluorocarbons (HCFCs).
- HCFCs have lower ozone depletion potential than CFCs, but they still contribute to global warming and are being phased out under the Montreal Protocol.
- Another replacement for CFCs is perfluorocarbons (PFCs), which are greenhouse gases but have no ozone depletion potential.
- They are mainly used in the semiconductor industry for etching and cleaning processes.
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