alleryWhich Gupta-era metal monument at Delhi is highly resistant to corrosion?
ABronze gate
BCopper dome
CIron Pillar
DSilver stupa
Answer & Solution
Correct answer: C. Iron Pillar
1. The Iron Pillar of Delhi resists corrosion.
2. A protective layer of iron hydrogen phosphate forms on its high-phosphorus iron.
3. Bronze, copper and silver structures are not the famed rust-free monument.
_Source: Wikipedia, Gupta Empire, Metallurgy and Engineering_
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