iron
CHANDRAGUPTA
Imperial Gupta Dynasty......in 4th century.......
asoka
asoka
This is not pure iron but a special steel.
Effect of acid rain on Iron Pillar of Qutub Minar is- When acid rain falls on the Iron Pillar the colour of Iron Pillar changes from red to black. Other factors like pollution and dust are also responsible. The government should take some strict actions on this issue.
to protectit
it was built by adil shah
emperor ashoka
Ashoka pillar has a layer of crystalline iron hydrogen phosphate which protect it from rusting.
it weighs about 6 tons