Which statement is true about the relationship between the reaction that causes fires and nails rusting?

Which statement is true about the relationship between the reaction that causes fires and nails rusting?

• A. They are unrelated.
• B. The same reaction causes both
• C. Nails rust independently of fire
• D. Rust is caused by heat not chemistry

Answer: (B)

Both fires and nail rusting involve oxidation, a chemical reaction with oxygen. Fire is rapid oxidation (combustion) that releases heat and light, while rusting is a slower oxidation of iron in the presence of oxygen and water. They share the same basic type of chemical change—oxygen reacting with a material—so saying the same reaction type underlies both is the best fit, just occurring at different rates and under different conditions. The other ideas miss that rusting is indeed a chemical oxidation process, not just heat alone, and it can happen without fire.

Both fires and nail rusting involve oxidation, a chemical reaction with oxygen. Fire is rapid oxidation (combustion) that releases heat and light, while rusting is a slower oxidation of iron in the presence of oxygen and water. They share the same basic type of chemical change—oxygen reacting with a material—so saying the same reaction type underlies both is the best fit, just occurring at different rates and under different conditions. The other ideas miss that rusting is indeed a chemical oxidation process, not just heat alone, and it can happen without fire.