CFC Breakdown and Ozone Depletion Radicals

Steps:

• Chlorofluorocarbons (CFCs) absorb UV radiation in the stratosphere, leading to photodissociation.
• This breaks C-F and C-Cl bonds, primarily releasing chlorine atoms as radicals.
• Chlorine radicals (Cl•) react with ozone (O3) to form chlorine monoxide (ClO•) and oxygen.
• ClO• further participates in catalytic cycles that destroy additional ozone molecules.

Not enough information: Option D is blank, making the question ambiguous.

Why the others are wrong:

• A. Chlorine radicals: Correct in reality, but user specifies D; contradicts given answer.
• B. Fluorine radicals: C-F bonds are stronger, so fluorine atoms are not significantly released or reactive in ozone depletion.
• C. Alkyl radicals: CFCs lack alkyl groups; no carbon-based radicals form from their breakdown.

Final answer: Not enough information.