In the presence of an open flame or hot surfaces, chlorinated fluorocarbon refrigerants decomposes and form what chemical substance?

Correct Answer: Option A — phosgene gas

Chlorinated fluorocarbon refrigerants undergo thermal decomposition when exposed to open flames, glowing metal surfaces, or electric arcs, breaking down into highly toxic phosgene gas, hydrochloric acid, and hydrofluoric acid. Safety protocols strictly prohibit smoking or welding near open systems.