Question

What are the causes of formation of ozone hole? (2 marks and 4 points)

Answer 1

1. Use of Chlorofluorocarbon (CFC's) in refrigerators and air conditioners. These CFC depletes ozone by reacting with the ozone and breaking it to oxygen.

2. Water vapours prevents formation of ozone.

3. Compounds of bromine and bromine oxide

4. Compounds of chlorine like carbontetrachloride and methylchloroform.

• the excessive use of CFC's in fridges and shaving foams.
• the fuel used by fighting jets also responsible for ozone depletion.