Multiple choice

In refrigerator, the refrigerent liquid is:

  1. Carbon

  2. Nitrogen

  3. Ammonia

  4. Liquid helium
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Ammonia (NH3) is a widely used refrigerant, especially in industrial and large commercial refrigeration systems due to its excellent thermodynamic properties. While modern household refrigerators commonly use HFCs or hydrocarbon blends like isobutane, ammonia remains an important refrigerant in the industry.

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