The iron pillar of Qutab Minar has not rusted for 1600 years . Give two Points .
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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.
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Answer:
Because it is getting painted
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