Which of the following describes LPG?

The correct choice is that LPG, or Liquefied Petroleum Gas, is liquefied under pressure. This characteristic is fundamental to its storage and transportation. LPG is primarily composed of propane and butane, which are gases at normal atmospheric pressure and temperature. However, when subjected to pressure, these gases condense into a liquid state. This property enables LPG to be stored in much smaller volumes than it would occupy as a gas, making it more efficient for use in heating, cooking, and as a fuel for vehicles.

LPG is also flammable, so describing it as a non-flammable gas does not accurately represent its properties. While LPG can be dangerous if not handled properly, it is not highly toxic; it mainly poses risks due to its flammability and potential asphyxiation in confined spaces rather than toxicity. Additionally, LPG is definitely not solid at room temperature; under ordinary conditions, it remains a gas until liquefied under pressure. Understanding these aspects of LPG is essential for safety and effective use in various applications.