In blast furnace, iron oxide is reduced by-

Correct option is C

The correct answer is (c) Carbon monoxide.
· In a blast furnace, iron oxide (Fe₂O₃ or Fe₃O₄) is reduced to iron by carbon monoxide (CO). Carbon monoxide acts as a reducing agent by removing oxygen from the iron oxide, producing iron and carbon dioxide in the process.
Reaction: Fe2O3+3CO→2Fe+3CO2
Information Booster:
· Carbon (b): Although carbon is used in the blast furnace, it primarily forms carbon monoxide, which then reduces iron oxide.
· Silica (a) and Limestone (d): These are used as flux to remove impurities and form slag, but they do not reduce iron oxide.