Question

The iron pillar near the Qutab Minar in Delhi has not rusted at all.Why?
please answer it in a proper answer i need it urgently.

Answer 1

Answer:

Iron pillar of Qutub Minar is not rusted because it was made by 98% wrought iron. Presence of high amounts of phosphorus (as much as 1 per cent against less than 0.05 per cent in today's iron) and absence of sulphur/magnesium in the iron are the main reasons for its longevity.

Answer 2

Answer:

Iron pillar of Qutub Minar is not rusted because it was made by 98% wrought iron.

Explanation:

Presence of high amounts of phosphorus (as much as 1 per cent against less than 0.05 per cent in today's iron) and absence of sulphur/magnesium in the iron are the main reasons for its longevity