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Iron can be protected by coating with zi...

Iron can be protected by coating with zinc or tin. If coating is broken.

A

Iron will corrode faster if coated with zinc

B

Iron will corrode faster if coated with tin

C

Iron will corrode faster in both cases

D

Iron will not undergo any corrosion in both cases

Text Solution

AI Generated Solution

The correct Answer is:
To solve the question regarding the protection of iron by coating it with zinc or tin, we need to analyze the reactivity of these metals and how they behave when the coating is compromised. Here’s a step-by-step breakdown of the solution: ### Step 1: Understand the Coating Materials - **Zinc and Tin**: Both are used to coat iron to prevent corrosion. Zinc is more reactive than iron, while tin is less reactive than iron. ### Step 2: Analyze the Situation When Coating is Broken - When the coating (either zinc or tin) is broken, we need to determine which metal will corrode first and how it affects the underlying iron. ### Step 3: Case of Zinc Coating - **Zinc Coating**: If the iron is coated with zinc and the coating is broken, the zinc will corrode instead of the iron. This is because zinc is more reactive than iron and will preferentially oxidize in a redox reaction. Therefore, the iron remains protected as long as there is zinc available to corrode. ### Step 4: Case of Tin Coating - **Tin Coating**: If the iron is coated with tin and the coating is broken, the tin will not corrode preferentially because it is less reactive than iron. In this case, the iron will start to corrode because it will take part in the redox reaction, leading to faster corrosion of the iron. ### Step 5: Conclusion - From the analysis, we can conclude that: - If coated with zinc, the iron remains protected even if the coating is broken. - If coated with tin, the iron will corrode faster once the coating is broken. ### Final Answer - Therefore, the correct answer is: **Iron will corrode faster if coated with tin.** ---
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