Assertion (A) : Large cold storage plants use ammonia as refrigerant. While domestic refrigerators use chlorofluorocarbons. Reason (R) : Ammonia can be liquefied at ambient temperature and low pressure. Codes

Hydrocarbons are compounds or molecules that contain only hydrogen and carbon atoms. Hydrocarbon derivatives are formed from hydrocarbons, but at least one of the hydrogen atoms in a hydrocarbon derivative is substituted with a different atom.