Question

Corrosion, wearing away due tochemical reactions, mainly oxidation (see oxidation-reduction, oxide). It occurs whenever a gas or liquid chemically attacks an exposed surface, often a metal, and is accelerated by warm temperatures and byacidsandsalts. Normally, corrosion products (e.g., rust, patina) stay on the surface and protect it. Removing these deposits re-expose the surface, and corrosion continues. Some materials resist corrosion naturally; others can be treated to protect them (e.g., by coating, painting,galvanizing, or anodizing).
1.What special name is given to the corrosion of iron? ____________________________________________________________________________________ 2.What type of chemical reaction is involved in the corrosion of iron? ____________________________________________________________________________________
3. Name any three structures which are gradually damaged by the corrosion of iron and steel?
____________________________________________________________________________________ 4.Write a chemical equation to show the process of corrosion of iron.

Answer 1

Answer:

1. Corrosion of iron is also called as Rusting of iron

2. In the process of corrosion of iron, a redox reaction takes place. Here, hydrogen and oxygen are added simultaneously.

3. (i) The iron pillars are corroded.

(ii) Many iron and steel based electrical appliances are damaged.

(iii) Iron gates, iron nails are corroded and are eaten by rust

4. 4Fe+3O₂+nH₂O→2Fe₂O₃.nH₂O is rust