MCQ Detailed View

Liquefied Petroleum Gas (LPG) is a flammable mixture of hydrocarbon gases used widely as a fuel for heating, cooking, and in vehicles. The major constituents of LPG are propane (C₃H₈) and butane (C₄H₁₀), with butane being the predominant component in most commercial LPG blends.

Butane is preferred in LPG because it liquefies easily under moderate pressure, making storage and transportation convenient. Its chemical properties also provide a high calorific value, producing efficient heat energy when burned. LPG is often stored in pressurized cylinders as a liquid, and upon release, it vaporizes into a gas for combustion.

Other options are incorrect:

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  Methane (CH₄) is the main component of natural gas, not LPG.

  
  


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  Ethane (C₂H₆) may be present in trace amounts but is not a major constituent.

  
  


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  Hydrogen (H₂) is not a component of LPG.

  
  

LPG plays a significant role in domestic, industrial, and automotive applications. It burns cleanly, producing mainly carbon dioxide and water with minimal soot, making it environmentally favorable compared to solid fuels. Its portability, high energy content, and ease of storage have made LPG a globally important fuel source.

Understanding the composition of LPG is essential in chemistry, energy studies, and industrial applications, as it highlights the practical uses of hydrocarbons in everyday life. The major constituent, butane, ensures that LPG remains a reliable, efficient, and safe fuel.

In summary, the correct answer is Butane, as it forms the largest portion of Liquefied Petroleum Gas and determines its storage and combustion properties.