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WBCS Preliminary Examination 2022 — General Studies · Question 127 of 200

Q127
General ScienceChemistry
Which among the following is present in refrigerator?
  1. a.Carbon dioxide
  2. b.Methane
  3. c.Helium
  4. d.Chlorofluorocarbon

Answer: (D) Chlorofluorocarbon

Traditional refrigerators use Chlorofluorocarbons (CFCs), also known as Freon, as refrigerants. CFCs have low boiling points and high volatility, making them effective at absorbing heat. However, they damage the ozone layer and have been largely replaced by more environmentally friendly HFCs under the Montreal Protocol.

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