In the manufacture of iron from haematite, limestone is added to act as:

an oxidizing agent

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a reducing agent

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flux

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slag

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Solution

The correct option is D flux
The flux used in the extraction of iron from Haematite in the blast furnace is lime stone.
$C a_{3} (P O_{4})_{2}$ present in lime stone reacts with $S i O_{2}$ to produce slag.
Option C is correct.

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