Multiple choice general knowledge science & technology

CFCs (chloro-fluoro-carbons) are greenhouse gases that have caused a rise of 0.3 ºC in the global temperatures in the past century. Name the CFC that is used in refrigerators.

  1. Carbon dioxide

  2. Freon

  3. Methane

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

Freon is the trade name for CFCs (chlorofluorocarbons) commonly used as refrigerants in refrigerators and air conditioning systems. CFCs are potent greenhouse gases that also damage the ozone layer. Carbon dioxide, methane, and ammonia are not CFCs - CO2 is a natural greenhouse gas, methane is from organic decomposition, and ammonia is a different refrigerant.

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