Question

The prime sources of chlorofluorocarbons is
A. Vehicular emission
B. Industrial effluents
C. Domestic sewage
D. Refrigeration equipments

Answer 1

Hint: Chlorofluorocarbons are the organic compounds that are composed of carbon, hydrogen, fluorine and chlorine.

Complete Answer:
- Chlorofluorocarbons are the full or partly halogenated paraffin hydrocarbons. Chlorofluorocarbons are the volatile compounds. They are the derivatives of methane, ethane and propane.
- Chlorofluorocarbons are the non toxic, non inflammable chemical compounds.
 Example – dichlorodifluoromethane (R-12 or Freon-12).
- They are commonly known as Freon by the DuPont.
- When chlorofluorocarbons also contain hydrogen in place of one or more Chlorine atoms then they are called hydrochlorofluorocarbons.
- Applications – Chlorofluorocarbons are used as aerosol spray propellants, solvents and foam-blowing agents because they are non-toxic and non-inflammable.

Sources of chlorofluorocarbons:
The main cause of Chlorofluorocarbon emission are Refrigerators. Other causes are-
- Fire suppression systems
- Aerosol sprays
- Aircraft Halon

Hence, option D is the correct option for this question.

Note: Chlorofluorocarbons are the main cause of Ozone hole. It destroys the Ozone layer which shields the Earth from Ultraviolet radiations that are generated by the Sun. Chlorofluorocarbons also cause Global warming.