Which of the following is chiefly present in LPG (Liquefied Petroleum Gas)?
(1) Methane
(2) Ethane
(3) Propane
(4) Butane
Answer: (4) Liquid petroleum gas is a flammable mixture of hydrocarbon gases used as a fuel in heating appliances and vehicles. It is increasingly used as an aerosol propellant and a refrigerant, replacing chlorofluorocarbons in an effort to reduce damage to the ozone layer. It has butane (C4H10) primarily.
