Conditions necessary for rusting iron are

exposed surface of iron

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moisture

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air

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presence of nitrogen

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Solution

The correct options are
A air
B moisture
D exposed surface of iron
Rusting of iron takes place in the presence of moisture(water) and air(oxygen). So, exposure of the surface of iron to air and water vapour(in the air) are necessary conditions for rusting of iron.

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Similar questions

The necessary condition for rusting of iron is:

(a) What is rust? Give the equation for the information of rust.

(b) State two conditions necessary for rusting of iron?

What are the necessary conditions for rust formation in Iron?

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