Multiple choice general knowledge science & technology

In refrigerator cooling is produced by

  1. Ice which deposits on the freezer

  2. The sudden expansion of a compressed gas

  3. The evaporation of volatile liquid

  4. none of these
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Refrigerators produce cooling through the evaporation of a volatile liquid refrigerant. When the refrigerant evaporates in the evaporator coils, it absorbs heat from the refrigerator compartment, creating the cooling effect. This is based on the principle that evaporation requires latent heat.

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