Multiple choice general knowledge science & technology

Which of the following is not used as a refrigerant ?

  1. amonia

  2. carbon monoxide

  3. sulphur dioxide

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

Carbon monoxide is not used as a refrigerant due to its toxicity and chemical properties. Ammonia (despite the typo 'amonia') is widely used in industrial refrigeration systems. Sulphur dioxide was historically used as a refrigerant. Carbon dioxide (CO2) is increasingly used in modern eco-friendly refrigeration systems. Only carbon monoxide serves no purpose as a refrigerant.

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