Which statement best matches methane's safety characteristics?

Which statement best matches methane's safety characteristics?

• A. It is odorless, tasteless, colorless, explosive
• B. It is greenish and heavier than air
• C. It is safe to handle without detectors
• D. It is always at room temperature gas

Answer: (A)

Methane’s safety characteristics hinge on how we detect it and how it behaves in air. It is colorless, odorless, and tasteless, which means leaks can go unnoticed unless we have detectors or odorants added to the gas to give a detectable smell. It is also highly flammable and can explode if it mixes with air within its flammable range (roughly 5% to 15% methane in air) and encounters an ignition source. Because of the lack of smell, detectors or odorants are essential for safety. Methane is lighter than air, so leaks tend to rise and accumulate near ceilings rather than at floor level. The statement that best matches these safety characteristics describes methane as odorless, tasteless, colorless, and explosive, while the other descriptions (greenish and heavier than air, safe to handle without detectors, or always at room temperature) don’t align with how methane truly behaves.

Methane’s safety characteristics hinge on how we detect it and how it behaves in air. It is colorless, odorless, and tasteless, which means leaks can go unnoticed unless we have detectors or odorants added to the gas to give a detectable smell. It is also highly flammable and can explode if it mixes with air within its flammable range (roughly 5% to 15% methane in air) and encounters an ignition source. Because of the lack of smell, detectors or odorants are essential for safety. Methane is lighter than air, so leaks tend to rise and accumulate near ceilings rather than at floor level. The statement that best matches these safety characteristics describes methane as odorless, tasteless, colorless, and explosive, while the other descriptions (greenish and heavier than air, safe to handle without detectors, or always at room temperature) don’t align with how methane truly behaves.