The surface of some metals, such as iron, is corroded when they are exposed to moist air for a long period of time. This phenomenon is known as __________ .

Erosion

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Corrosion

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Rusting

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Both A and B

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Solution

The correct option is B Corrosion

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Similar questions

Q. Explain why, the surface of some metals acquires a dull appearance when exposed to air for a long time.

When copper is exposed to moist air for a long time then a layer deposits on its surface due to corrosion. The colour of this layer is:

Q. Iron when exposed to moist air forms a reddish brown layer of iron oxide, which is known as rust.

When a vessel is exposed to moist air for a long time,then a green coating is formed on its surface.The vessel must be made of :

(a) zinc

(b) magnesium

(d) copper

(a) Give the reason why copper is used to make hot water tanks but steel (an alloy of iron) is not
(b) Explain why the surface of some metals acquires a dull appearance when exposed to air for a long time.

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