Which statement best describes an organic peroxide's hazard?

• A. A carbon-containing compound with two adjacent oxygen atoms bonded together
• B. A substance that releases chlorine
• C. A highly viscous oil
• D. A metal oxide-based compound

Answer: (A)

Organic peroxides are defined by a peroxide group, where two oxygen atoms are bonded together between carbon-containing groups. That O–O bond is unusually unstable and can break rapidly under heat, friction, or contamination, releasing energy and often gas. This makes organic peroxides highly reactive and capable of causing fires or even explosions, since they are strong oxidizers that can fuel violent decomposition. The statement describing a carbon-containing compound with two adjacent oxygen atoms bonded together captures this key feature. The other options describe properties that don’t define organic peroxides—releasing chlorine, being a highly viscous oil, or being a metal oxide-based compound.