Chemistry - Environmental Chemistry Question with Solution | TestHub
is responsible for the decomposition of ozone to form oxygen. Which of the following reacts with ozone to form oxygen?
Options:
Answer:
Solution:
Explain the question :
Identify the reactive species that breaks down ozone.
Concept : Free radical catalytic ozone depletion.
Solution :
Step 1: Initiation (Photodissociation) In the stratosphere, ultraviolet (UV) radiation breaks the C-Cl bond in CFCl3 to release highly reactive chlorine free radicals Cl· .
Step 2: Propagation (Ozone Decomposition) The chlorine radical reacts directly with ozone (O3)to form chlorine monoxide (ClO) and oxygen (O2).
Step 3: Regeneration The 
radical reacts with atomic oxygen to regenerate the Cl· radical, allowing it to destroy thousands more ozone molecules.
Final Answer : Option (D) : Cl· (Chlorine free radical)