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Question

Why do iron bridges use zinc coating?


A
Cost effective
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B
Prevention of corrosion
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C
Improve electrical conductivity
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D
Increasing strength
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Solution

The correct option is B Prevention of corrosion
The zinc layer prevents iron contact with moisture. Due to this, the corrosion process is considerably slowed down. Hence, coating iron with zinc prevents iron corrosion making it very useful for materials of bridges.

Physics

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