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Corrosion

A common meta...

Question

A common metal which is highly resistant to corrosion is:
(a) iron (b) cuprite (c) pyrolusite (d) haematite

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Solution

Answer :

(c) aluminium
Aluminium is resistant to corrosion due to the formation of a thin oxide layer (aluminium oxide or $A l_{2} O_{3})$ . This prevents further corrosion by creating a strong protective layer over the surface of the metal.

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