Which of the Following Is True of Ozone

Multiple Choice

Which of the following is true of ozone?

A) the total amount of ozone is very large compared to the amount of oxygen in the atmosphere.
B) it is inert i.e.,it is chemically non-reactive.
C) it consists of threeoxygen molecules.
D) it experiences natural fluctuations in amount and has been increasing in volume for hundreds of millions of years.
E) if the production of CFCs were stopped today,the CFCs already present in the atmosphere would be unable to continue to destroy ozone for decades.