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Q: The principle of evaporation of liquid to absorb heat, is used in –
  • A. Microwave oven
  • B. Refrigerator
  • C. Geyser
  • D. Electric kettle
Correct Answer: Option B - The principle of evaporation of a liquid to absorb heat is used in the refrigerator. The cooling of a place or substance at a temperature below the temperature of its atmosphere is called refrigeration. This mechanical method extends from making ice to food and drink. This is done to keep things cool and preserve them for longer.
B. The principle of evaporation of a liquid to absorb heat is used in the refrigerator. The cooling of a place or substance at a temperature below the temperature of its atmosphere is called refrigeration. This mechanical method extends from making ice to food and drink. This is done to keep things cool and preserve them for longer.

Explanations:

The principle of evaporation of a liquid to absorb heat is used in the refrigerator. The cooling of a place or substance at a temperature below the temperature of its atmosphere is called refrigeration. This mechanical method extends from making ice to food and drink. This is done to keep things cool and preserve them for longer.