WBCS.LIVE practice question

Which gas is used as a coolant in refrigerators and is safe for the ozone layer?

Solve this multiple-choice question and check the correct answer with its explanation below.

Answer options

  1. Ammonia
  2. Freon
  3. Hydrofluorocarbons (HFCs)
  4. Carbon Tetrachloride

Correct answer and explanation

Correct answer: Hydrofluorocarbons (HFCs)

Explanation: āœ… Correct Answer: C) Hydrofluorocarbons (HFCs) šŸ“š Explanation: HFCs were developed as a replacement for CFCs and HCFCs because they do not contain chlorine and thus do not deplete the ozone layer. While they are safe for the ozone, they are still potent greenhouse gases that contribute to global warming. Modern research is now shifting towards natural refrigerants like ammonia or carbon dioxide to further reduce environmental impact.