Which of the Following Refrigerant is Highly Toxic and Flammable

By BYJU'S Exam Prep

Updated on: September 25th, 2023

Which of the following refrigerant is highly toxic and flammable

  1. Ammonia
  2. Carbon dioxide
  3. Sulphur dioxide
  4. R-12

Answer: A: Ammonia

Ammonia refrigerant is highly toxic and flammable.


A refrigerant is a working fluid that is used in the refrigeration cycle of air conditioning systems and heat pumps, where it typically undergoes a repeated phase transition from liquid to gas and back.

Ammonia is a chemical compound of one nitrogen atom and three hydrogen atoms. The aqueous form of ammonia is known as ammonium hydroxide. This compound has a pungent smell. It is a dangerous and caustic compound. Hence, ammonia refrigerant is highly toxic and flammable.

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