Final answer:
Rusting of iron is not considered a combustion reaction because it is a slow process that does not involve the rapid release of energy or light, but rather a slow corrosion process resulting in iron oxide. b. No
Step-by-step explanation:
When iron rusts, it undergoes a slow chemical process called corrosion, more specifically the formation of iron oxide. While both rusting and combustion are oxidation reactions, rusting is not classified as a combustion reaction. Rusting occurs over a long period, causing iron to combine with oxygen to form a hydrated form of iron(III) oxide, also known as rust, but it does not involve the rapid release of energy or light as in combustion.
Furthermore, combustion involves an immediate reaction that is often exothermic, producing heat and light, unlike the slow energy release that is imperceptible to the touch in the case of rusting.
Thus, the correct answer to whether rusting is a combustion reaction is b. No, because it is a much slower process that does not result in the fast release of energy and light typically seen in combustion.