Question

What are the chief pollutants of the atmosphere, which are most likely to deplete the ozone layer?

• A. Sulphur dioxide
• B. Nitrogen oxide and Fluorocarbons
• C. Carbon dioxide
• D. Carbon monoxide

Answer 1

Answer: (B)

Nitrogen oxide and Fluorocarbons

Chlorofluorocarbons or Chlorofluoromethane are also known as freon or aerosols. They are chemicals used as refrigerants, propellants and solid plastic foams. These chemicals are also released as aerosols by jets flying at high altitudes. Along with nitrogen oxides, chlorofluorocarbons react with ozone of ozonosphere and depletes the same. Chlorofluorocarbons release reactive chloride which directly reacts with ozone molecules setting a chain reaction.

So, the correct answer is option B.