Concept:Ultraviolet light releases chlorine atoms from chlorofluorocarbons (CFCs), and these free chlorine atoms damage the ozone layer.
Explanation:In the upper atmosphere, ultraviolet radiation breaks the carbon–chlorine bond in a chlorofluorocarbon molecule.
This releases a free chlorine atom, written as
Cl.
This free chlorine atom is highly reactive because it has an unpaired electron.
It readily attacks ozone,
O3, in the stratosphere.
The chlorine atom removes an oxygen atom from ozone to form chlorine monoxide,
ClO, and oxygen gas,
O2.
The
ClO can then react with free oxygen atoms to regenerate the chlorine atom, allowing one chlorine atom to destroy many ozone molecules.
Therefore, the free chlorine atom will be very reactive and will attack ozone.
Answer:A. be very reactive and will attack ozone.