All are true regarding disinfectants except -
Ethylene oxide : it is highly inflammable and explosive. it is especially used used forsterilisation hea-lung machines ,respirators ,sutures,dental equipments ,books and clothings it has been used for sterilising wide range of materials REF:Ananthanarayan & Panicker's Textbook of Microbiology 9th edition pg no:35
Gluteraldehyde is sporicidal
Hypochlorites are virucidal
Ethylene oxide is intermediate disinfectant
Phenol usually requires organic matter to act
general microbiology