why the iron pillar situated in Delhi has not rusted even after so many years? Give answer in 80 to 90 words .
Answers
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.
During its making it must have been kept in its molten state for a very long time . Due to this all impurities , which could later on react with humidity , oxygen etc present in the atmosphere , would have been totally eliminated ..
hope it helps..
Answer:
Iron pillar of Qutub Minar is not rusted because it was made by 98% wrought iron. ... A thin layer of a˜misawitea (formed catalytically by the presence of phosphorous in the iron), a compound of iron, oxygen and hydrogen, has also protected the pillar.
Explanation:
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