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

Correct Answer: Option D — phosgene gas

Chlorinated fluorocarbon (CFC) and hydrochlorofluorocarbon (HCFC) refrigerants undergo thermal decomposition when exposed to open flames, glowing electric heating elements, or high-temperature metal surfaces, breaking down chemically to produce highly toxic phosgene gas alongside hydrochloric and hydrofluoric acids.