A chemical used in refrigerators and air conditioners and is a source of Cl− is __________.
The freons are simple fluorinated and aliphatic organic compounds that contain fluorine, carbon, hydrogen, chlorine, bromine etc. These are used as the refrigerants and propellants. Chlorofluorocarbons, Hydrochlorofluorocarbons are the types of freons. They have a low boiling point and low suface tension due to which they are used in refrigerators, air conditioners etc. However, they undergo photo-dissociation when exposed to the UV rays, releasing a reactive chlorine ion that is capable of reacting with ozone. This reaction is responsible for the depletion of the ozone in the stratosphere. Hence, the correct answer is 'Freon'.