WBCS.LIVE practice question

In a refrigerator what produces cooling?

Solve this multiple-choice question and check the correct answer with its explanation below.

Answer options

  1. The ice which deposits on the freezer
  2. The sudden expansion of a compressed gas
  3. The evaporation of a volatile liquid
  4. None of these

Correct answer and explanation

Correct answer: The sudden expansion of a compressed gas