Question

Which one of the following is the main constituent of LPG?
1. Hexane
2. Pentane
3. Butane
4. Methane

Answer 1

Correct Answer - Option 3 : Butane

The correct answer is Butane.

• LPG stands for liquefied petroleum gas.
• Like all fossil fuels, it is a non-renewable source of energy.
• It is extracted from crude oil and natural gas.
• LPG is composed of hydrocarbons containing three or four carbon atoms.
• The normal components of LPG thus, are propane (C₃H₈) and butane (C₄H₁₀).
• Small concentrations of other hydrocarbons may also be present.
• Ethyl mercaptan is added to LPG to prevent the threats of fire.
• Ethanethiol, commonly known as ethyl mercaptan and stench, is a clear liquid with a distinct odour. 
• LPG is naturally colourless, odourless and is also flammable.
• Ethyl Mercaptan is a colourless or yellowish liquid or a gas with a pungent, garlic or skunk-like odour.
• It is used as an additive to odourless gases like butane, propane, and petroleum to give them a warning odour.