Q.

What is the Mehrauli Pillar in the complex of Qutub Minar primarily famous for?

A. Proverbial height
B. Skilful stone cutting
C. Excellent quality steel
D. Statue of Buddha on top
Answer» C. Excellent quality steel
Explanation: The Iron Pillar located in Delhi, is a 7 m (23 ft) column in the Qutb complex, notable for the rust resistant composition of the metals used in its con struction. The pillar has attracted the attention of archaeologists and materials scientists because of its high resistance to corrosion. The corrosion resistance results from an even layer of crystalline iron hydrogen phosphate hydrate forming on the high phosphorus content iron, which serves to protect it from climate.
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