Calcium of the lime stone added in the metallurgy of iron comes out at the end as:

C a C O_{3}

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C a O

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C a S i O_{3}

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None of these

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Solution

The correct option is C $C a S i O_{3}$
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.

Reaction in blast furnace:
$C a O + S i O_{2} \to C a S i O_{3}$ (slag)
Option C is correct.

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C a C O_{3}

In metallurgy of iron, when limestone is added to the blast furnace, the calcium ends up in:

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