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Question

Zinc-coated iron is used in the design of automobiles because:


A
Zinc can be coated onto iron easier than other metals.
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B
It makes the automobile lighter in weight.
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C
Zinc is abundantly available than any other metal.
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D
It is more resistant to corrosion. 
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Solution

The correct option is D It is more resistant to corrosion. 
Iron is coated with zinc to protect it from corrosion. Zinc-coated iron has more resistance to corrosion than simple iron. That is why it is used in the design of automobiles and also in the construction of bridges.

Physics

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