The slag formed in the blast furnace during the extraction of iron from haematite is:

C a_{3} (P O_{4})_{2}

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C a S i O_{3}

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F e S i O_{3}

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M n S i O_{3}

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Solution

The correct option is B $C a S i O_{3}$
$C a O$ reacts with the impurities of ore called gangue particles to form slag. Slag is the mixture of $C a S i O_{3}$ and $C a (A l O_{2})_{2}$ .Slag is a useful byproduct. It is usedin road making, cement manufacturing a light weight building materials.
$F l u x + g a n g u e \to S l a g$
$C a O + S i O_{2} \to C a S i O_{3}$
$C a O + A l_{2} O_{3} \to C a (A l O_{2})_{2}$
Hence option B is correct.

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