Question

1 Observe the following picture & answer the following question

1) What is rust?
2) Write the chemical formula of rust
3) Write the reaction of oxidation of iron at cathode
4) Write the reaction of oxidation of iron at anode
5) What is corrosion?​

Answer 1

1. Rust - Rust in an iron oxide, a usually reddish brown oxide formed by the reaction of oxygen in the presence of water or air moisture.
2. The chemical formula of rust- Fe2O3•XH2O. It is called hydrated ferric oxide.

• 5. corrosion - Corrosion is defined as ‘an irreversible interfacial reaction of a material (metal, ceramic, polymer) with its environment which results in consumption of the material or in dissolution into the material of a component of the environment’