Which statement is true regarding decomposition products compared to the original material?

Which statement is true regarding decomposition products compared to the original material?

• A. They may present different hazards than the original material
• B. They never differ in hazard
• C. They are always more hazardous
• D. They are always less hazardous

Answer: (A)

Hazards can change when a substance decomposes because new chemicals are formed. The decomposition products may have different properties, so they can be toxic, corrosive, flammable, or highly reactive in ways the original material was not. That means you can’t assume the hazard stays the same—sometimes the products are more dangerous, sometimes less, and sometimes simply different in nature. For example, heating certain materials can release toxic gases like nitrogen oxides or sulfur-containing vapors that weren’t present initially. So the true statement is that decomposition products may present different hazards than the original material. The other choices wrongly imply the hazard profile never changes or always moves in one direction.

Hazards can change when a substance decomposes because new chemicals are formed. The decomposition products may have different properties, so they can be toxic, corrosive, flammable, or highly reactive in ways the original material was not. That means you can’t assume the hazard stays the same—sometimes the products are more dangerous, sometimes less, and sometimes simply different in nature. For example, heating certain materials can release toxic gases like nitrogen oxides or sulfur-containing vapors that weren’t present initially. So the true statement is that decomposition products may present different hazards than the original material. The other choices wrongly imply the hazard profile never changes or always moves in one direction.