In the upper atmosphere, the ultra-violet light breaks off a free chlorine atom from chlorofluorocarbon molecule. The effect of this is that the free chlorine atom will
be very reactive and will attack ozone
be non-reactive and will not attack ozone
not change the level of ozone in the atmosphere
increase the level of ozone in the atmosphere
Correct answer is A
CFCs (Chlorofluorocarbons) have a lifetime in the atmosphere of about 20 to 100 years, and consequently one free chlorine atom from a CFC molecule can do a lot of damage, destroying ozone molecules for a long time