Question

[TBQ.VI.4]
State two conditions necessary for rusting of iron.

Answer 1

Conditions for rusting of iron:

• The presence of water and oxygen is essential for the rusting of iron.
• Impurities in the iron, the presence of water vapour, acids, salts and carbon dioxide hasten to rust.
• Pure iron does not rust in dry and CO₂ free air. It also does not rust in pure water, free from dissolved salts.