1. Give an example in each of the following case to support that:
(i) Corrosion of some metals is an advantage.
(ii) Corrosion of a metal is a serious problem.
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Answer: 1) Here are some advantages of corrosion:
urface corrosion forms an oxide layer. It acts as a barrier for air and moisture and thereby preventing the inner metal from corrosion.
Some metals like zinc act as sacrificial anodes to prevent corrosion to other metals.
2) Corrosion of iron is a serious problem because it leads to wastage of tonnes of iron every year and lot of money is spent to repair or replace it.
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