Multiple choice

Which of the following gases is present in an air conditioner?

  1. Neon

  2. Freon

  3. Methane

  4. Helium

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Freon is a chlorofluorocarbon (CFC-113). In addition to being used in air conditioning systems, it is also used as refrigerant in refrigerators and freezers and also in firefighting systems, and as an aerosol propellant.