High electric arc discharge to generate ozone, broad spectrum UV generating light, Chlorine detector, and some R-12.

Set up chamber to hold low pressure air with Ozone and expose to UV, check chlorine & Ozone levels, intro duce R-12 let sit, recheck the levels, you'll find more chlorine and less Ozone, now this disregards allot of the more complex issues but gives a rather direct conclusion.
Interesting, MG. Not something I would classify as a home project, however. Perhaps a good school project, though.

What would happen if I just placed a dish of chlorine in the chamber?