Question

what is meant by corrosion? write the reactions involved in (i) rusting of iron (ii) formation of green layer over the copper. (iii) tarnishing of silver​

Answer 1

Answer:

1. 4Fe + 3O2 → 2Fe2O3.
2. Copper metal when exposed to air turnsgreen in colour due to corrosion. Whencopper vessel is exposed to air in rainy season, the metal reacts with gases and moisture and atmospheric gases to form a mixture of copper carbonate andcopper hydroxide. This gives a greencolour to the surface of copper metal.
3. When silver is exposed to sulfur-containing gases in the air, it discolours and then darkens as it reacts with the gas to form a surface layer of tarnish. This process is called tarnishing, as explained below in The science of silver tarnish and its cause. ... 

Explanation:

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Answer 2

Answer:

corrosion is a process in which iron is coroosed due to oxidation-reduction reaction i.e redox reaction in iron...

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Co2 + Fe = FeO + C

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Explanation:

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