Tamilnadu BoardEnglish MediumSTD 8ScienceAir.1 Mark
Question
Write a note on rusting process.
✓
Answer
The process of conversion of iron into its hydrated form of oxide in the presence of air and moisture (humid atmosphere) is called rusting. Rust is hydrated ferric oxide.
$4 Fe+3 O_2 \rightarrow 2 Fe_2 O_3$
$Fe_2 O_3+XH_2 O \rightarrow 2 Fe_2 O_3 . XH_2 O$
( $X =$ Number of water molecules which is variable).
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.