Which property is true regarding hydrogen gas compared to other flammable gases?

The correct answer is that hydrogen gas has the lowest ignition energy compared to other flammable gases. This property is significant because it means that hydrogen can ignite with much less energy than many other gases, making it more susceptible to ignition under various conditions. The low ignition energy explains why hydrogen can easily catch fire when it comes into contact with an open flame or a spark.

This characteristic is particularly important in handling and storing hydrogen, as safety protocols must account for its increased risk of ignition. In contrast, gases with higher ignition energies require a greater amount of energy to ignite, resulting in reduced risks of accidental ignition under certain conditions. Understanding the ignition properties of hydrogen is crucial for ensuring safety in environments where it is used or present.