Question

LPG is mainly a mixture of two hydrocarbons:
A.) butane + ethane
B.) butane + isobutane
C.) propane + ethane
D.) methane + ethane

Answer 1

Hint: Have you ever noticed when you get your LPG gas cylinder changed at home, there is a quick gush of gases coming out while you plug the nozzle in the stove. It smells very pungent and rotten. Let’s know which gases are these.

Complete step by step solution:

A hydrocarbon is an organic compound which is composed exclusively of hydrogen and carbon atoms. They are naturally-occurring compounds and form the basis of crude oil, natural gas, coal, and other important energy sources.
LPG stands for liquefied petroleum gas. It is one of the fossil fuels that means it is a non-renewable source of energy. Generally, it is extracted from crude oil and natural gas.
It burns easily in air and almost has an energy content similar to that of petrol and the heat energy is twice that of natural gas. This makes LPG an excellent fuel for cooking, heating and automotive usages.
It is composed of hydrocarbons that mainly contain three or four carbon atoms. They are generally composed of propane (\[{{C}_{3}}{{H}_{8}}\]) and butane (\[{{C}_{4}}{{H}_{10}}\]). Small quantities of other hydrocarbons can also be present.
Normally, LPG gas is stored under pressure in a steel container and it is in liquid form. The pressure inside the container will depend on the type of LPG stored and the temperature outside.
The percentage composition of propane and butane in an LPG gas mixture ranges from 100% - 20% propane and 80% butane.

So, from the above statements we can conclude that LPG is a mixture of propane and butane.
Thus, none of the options are correct.

Note: Methane and ethane, both of which are gaseous under atmospheric conditions, are the composition of natural gas. The mixture of natural gas may contain other hydrocarbons, such as propane, butane, pentane, and hexane.