What is the role of limestone during the extraction of iron from haematite ore?

Leaching agent

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Oxidizing agent

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Reducing agent

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Flux

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Solution

The correct option is D Flux
During the extraction of iron from haematite ore, limestone acts as a flux. Limestone decomposes froming CaO which reacts with silica forming slag.
$C a C O_{3} \to C a O + C O_{2}$
$C a O + S i O_{2} \to C a S i O_{3} (s l a g)$

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