Which statement about decomposition products is true?

Which statement about decomposition products is true?

• A. They always present different hazards
• B. They always present the same hazards
• C. They are never hazardous
• D. They are often present different hazards than the original

Answer: (D)

When a substance decomposes, it breaks into new chemical species that bring their own hazards. The decomposition products can have different toxicity, flammability, corrosivity, or reactivity than the original material, so the overall hazard profile often changes. That’s why the statement about decomposition products being often present different hazards than the original is the best one. It recognizes that new chemicals formed during decomposition can pose different risks, and sometimes more dangerous or different kinds of hazards than the starting material. It’s not guaranteed in every case, but it’s a common and important pattern. The other options are too absolute or incorrect: hazards aren’t guaranteed to be different in every case, they can sometimes be the same or become less hazardous, and decomposition can indeed produce hazardous products.

When a substance decomposes, it breaks into new chemical species that bring their own hazards. The decomposition products can have different toxicity, flammability, corrosivity, or reactivity than the original material, so the overall hazard profile often changes.

That’s why the statement about decomposition products being often present different hazards than the original is the best one. It recognizes that new chemicals formed during decomposition can pose different risks, and sometimes more dangerous or different kinds of hazards than the starting material. It’s not guaranteed in every case, but it’s a common and important pattern.

The other options are too absolute or incorrect: hazards aren’t guaranteed to be different in every case, they can sometimes be the same or become less hazardous, and decomposition can indeed produce hazardous products.