Which of the following are the ways to prevent rusting of iron?

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Galvanization

Oiling

Greasing

All the above

answer is D.

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Detailed Solution

Concept- Red and orange coating on the surface of iron are formed by rusting, the presence of a layer of iron oxide above the parent iron metal is rusting
Oxidation reaction forms Rusting, when water and oxygen react with iron forms hydrated iron oxide, which results in rust formation

4 F e + 3 O 2 + x H 2 O → 2 F e 2 O 3 + x H 2 O

Ways to prevent rusting of iron:
1) Galvanization: When the iron composition is covered with a subcaste of zinc essence, at that point it keeps the iron from coming in contact with oxygen and moisture. In this way, rusting can be averted.
2) Oiling, oil, or greasing When we apply oil paint, grease, or makeup, also the face becomes leakproof and the humidity and oxygen present in the air can not come into direct contact with iron. Thus, rusting can be averted.
Hence, the correct option is 4.

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