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Q.

Which of the following ways can help in the prevention of rusting?


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a

Galvanization

b

Painting

c

Oiling

d

All of the above 

answer is D.

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Detailed Solution

Rusting can be prevented by all of the above, i.e., galvanization, painting, and oiling the iron articles.
Rusting is a chemical phenomenon in which iron comes in contact with air and water and forms an iron oxide called rust. Normally, galvanised metal is coated with a thin layer of zinc to protect it against corrosion. Also, if we paint an iron object, it does not come in contact with atmospheric oxygen and moisture directly; this prevents rusting. Also, metal coated in oil forms a protective barrier that stops any external elements from seeping through.
 
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