Solution :Chlorodifluoromethane or difluromonochlromethane is a hydrochloroflurocarbon (HCFC). This COLORLESSGAS in better known as HCFC - 22, or R - 22 . IT is commonly used as a propellant and refrigerant . R - 22 is PREPARED from chloroform `CHCl_3+2HF rarrCHF_2Cl+2HCl`