1) Corrosion is occur due to mixture of iron and ___________ a) oxygen b) nitrogen c) hydrogen d) none of these 2) Which of the following is not corrosion resistant metal ? a) copper b) zinc c) steel d) nickel 3) Which of the following is an example of corrosion? a) Rusting of iron b) Liquefaction of ammonia c) Rusting of iron and tarnishing of silver d) Tarnishing of silver 4) Corrosion is an example of a) Oxidation b) Reduction c) Electrolysis d) Erosion

rusting

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