Which of the following gases is tasteless and odorless?

The correct answer highlights that all the listed gases—methane, hydrogen, and oxygen—are indeed tasteless and odorless, which is an important characteristic for each of them.

Methane, a common hydrocarbon gas, has no detectable odor or taste, making it challenging to identify in case of leaks without adding odorants for safety. Hydrogen, which is a lightweight and flammable gas, also has no taste or smell; its properties require careful handling due to its reactivity. Oxygen, essential for life and combustion processes, is also tasteless and odorless, although it is crucial in supporting life as it facilitates respiration in animals and combustion in various materials.

Recognizing that all these gases share the characteristics of being tasteless and odorless is crucial for safety practices in mining and industrial environments, where detecting gas leaks or hazardous conditions is essential. Understanding these properties helps in forming strategies for monitoring air quality and ensuring the safety of personnel in those settings.