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Why do we often apply paint on iron articles?

Question
Why do we often apply paint on iron articles?
To make them look more colourful only
To prevent corrosion by keeping moisture and air away from the metal surface
To increase their weight
To make them conduct electricity better
Answer
To prevent corrosion by keeping moisture and air away from the metal surface
Detailed Explanation
Paint forms a protective barrier that keeps moisture and air away from the iron surface, helping to prevent corrosion (rusting).
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