Question

LPG consists of mainly:
a) Methane, ethane and hexene
b) Ethane, hexane and nonane
c) Methane, hexane and nonane
d) Methane, butane and propane

Answer 1

Hint: LPG is a clean fuel, which is very widely used in the kitchen for cooking and at homes as a gas in the central heating system. It is generally derived from petroleum or wet natural gas. It mainly consists of lower weight hydrocarbons.

Complete step by step answer:
LPG stands for Liquified petroleum gas. It is a mixture of many hydrocarbons. LPG is generally obtained by extracting wet natural gas from reservoir or refining petroleum. It can also be extracted from crude oil.

LPG is mainly composed of methane \[(C{{H}_{4}})\], butane \[({{C}_{3}}{{H}_{8}})\] and propane \[({{C}_{4}}{{H}_{10}})\]. Other than methane, butane and propane, other gases present in LPG include – isobutane, ethane, ethylene, propylene, butylene, isobutylene.
LPG is a clean fuel, i.e., it leaves a smaller number of residues. In today’s scenario, it has replaced chlorofluorocarbons as a fuel, which is a greenhouse gas and is responsible for depleting the ozone layer.
LPG is also very heavier than air.Therefore, can easily be compressed into a liquid at relatively low pressures.

Therefore, the answer is – option (d) – LPG consists of mainly methane, butane and propane.

Additional Information:
LPG is very efficient as a fuel. It is because it has a higher calorific value, around 90-95. (calorific value of CNG is around 35-40)

Note: LPG is the fuel which causes rapid combustion for burning flame in kitchen stoves. Not only this, it is also used for central heating, water heating in homes. Recently, LPG has also been used as an aerosol propellant in rockets.