Corrosion of iron produces:
AIron sulfate
BHydrated iron oxide (rust)
CIron chloride
DFree iron metal
Answer & Solution
Correct answer: B. Hydrated iron oxide (rust)
Corrosion is the process where metals are slowly eaten away by the action of air, moisture, or chemicals on their surface. For iron, this specific process is known as **rusting**.
1. **Reactants**: Rusting requires the presence of both oxygen ($O_2$) and water ($H_2O$).
2. **Chemical Reaction**: The iron ($Fe$) reacts with oxygen and water to form a reddish-brown flaky substance. The chemical equation is generally represented as:
$$4Fe + 3O_2 + xH_2O \rightarrow 2Fe_2O_3 \cdot xH_2O$$
3. **Product Name**: The product $Fe_2O_3 \cdot xH_2O$ is chemically known as **Hydrated iron(III) oxide**, commonly called rust.
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