Which of the following are properties of carbon monoxide gas?

Carbon monoxide gas has several important properties that make it particularly hazardous and relevant in discussions about gas safety. The key properties include being odorless, tasteless, and colorless. These characteristics contribute to its danger, as individuals may not be aware of its presence in their environment, increasing the risk of carbon monoxide poisoning.

The recognition that carbon monoxide is both colorless and tasteless indicates that it cannot be detected through sight or taste, which emphasizes the importance of using CO detectors in environments where combustion occurs. Furthermore, the fact that it is combustible means that it can participate in combustion reactions under appropriate conditions, reinforcing why proper ventilation and safety measures are essential when dealing with fuel combustion sources.

Therefore, the answer that encompasses all these properties—being odorless, colorless, tasteless, and combustible—is the most comprehensive and accurate, as it reflects the complete set of characteristics of carbon monoxide gas.