Multiple choice general knowledge

Which of the following is not used as a refrigerant ?

  1. carbon monoxide

  2. ammonia

  3. sulphur dioxide

  4. carbon dioxide
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Carbon monoxide is not used as a refrigerant because it's highly toxic, flammable, and doesn't have suitable thermodynamic properties for cooling cycles. Ammonia, sulfur dioxide, and carbon dioxide have all been historically used as refrigerants in various applications. The question asks which is NOT used.

Keep practicing — related questions