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Asian Sciences Olympiad 2015 — Division M, Level 3 (Years 7–9) Question 9

ASMO Science · Asian Sciences Olympiad 2015 — Division M, Level 3 (Years 7–9)

Question 9

Aerosol spray is used widely in the world to release liquid in the form of mist when propelled out. Chlorofluorocarbons (CFCs) were once used as the propellants until the introduction of Montreal Protocol in 1989. What is the reason of banning the use of CFCs as propellants?

Question illustration
  1. CFCs are not effective in propelling liquid.
  2. CFCs are expensive as compared to other propelling agents.
  3. CFCs can react with the liquid contained.
  4. CFCs can cause damage to ozone layers.