Which of the following liquids is considered the most common form of LPG?

The most common form of LPG, or liquefied petroleum gas, is propane. This gas is widely used for heating, cooking, and in certain types of vehicles that utilize alternative fuels. Propane is favored for its high energy content, reliability, and efficient combustion properties when used in various applications.

In the context of LPG, propane is typically sourced from natural gas processing and petroleum refining. Its physical properties allow it to be easily liquefied under pressure, making it convenient for storage and transport. This versatility contributes significantly to its prevalence as a fuel, particularly in regions where natural gas is not readily available.

Other liquids mentioned, such as butane, propylene, and butylene, are also components of LPG mixtures, but they do not match the widespread usage and availability of propane. Butane, for example, is more commonly used in portable fuel canisters and can be part of LPG, especially in warmer climates where it remains a gas at higher temperatures. However, propane remains the most recognized and consumed form of LPG globally.