During extraction of iron, which of the following reaction(s) exhibit development of elemental impurities in iron?

C a O + S i O_{2} \to C a S i O_{3}

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M n O_{2} + C Δ - \to M n + C O

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C a_{3} (P O_{4})_{2} Δ - \to P_{4} O_{10} C - \to Δ P_{4}

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S i O_{2} + 2 C Δ - \to S i + 2 C O ↑

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Solution

The correct options are
B $M n O_{2} + C Δ - \to M n + C O$
C $S i O_{2} + 2 C Δ - \to S i + 2 C O ↑$
D $C a_{3} (P O_{4})_{2} Δ - \to P_{4} O_{10} C - \to Δ P_{4}$
During extraction of iron, reaction(s) exhibiting development of elemental impurities in iron are:
$S i O_{2} + 2 C Δ - \to S i + 2 C O ↑$
$M n O_{2} + C Δ - \to M n + C O$
$C a_{3} (P O_{4})_{2} Δ - \to P_{4} O_{10} C - \to Δ P_{4}$

$C a O + S i O_{2} \to C a S i O_{3}$ is a reaction of formation of slag. Except this reaction all produce elemental impurities i.e, $M n, P_{4}, S i$
Option B,C, D are correct.

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