Question

what is rust?explain. why iron objects rust? give equation. Also give conditions necessary for rusting.

Answer 1

Rust is the hydrated oxide of iron.
Iron objects rust due to the presence of O2 and H2O

Answer 2

the corrosion of iron is called rust.
iron object rust as iron is a reactive metal it react with the oxygen and moisture present in the air.
reaction:-
fe +o2 -> fe2o3
fe2o3 + xH2O -> fe2O3.xh2O
conditions for rusting are presence of oxygen and moisture in the air.