Which of the following species is desirable substance in extraction of copper but not in extraction of iron?

C a S i O_{3}

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F e S i O_{3}

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S i O_{2}

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coke

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Solution

The correct option is C $S i O_{2}$
Haematite ore of iron contain Si as impurity where it reacts with $O_{2}$ to produce $S i O_{2}$ which is further used in formation of slag.
But in extraction of copper $S i O_{2}$ is needed to form slag.

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S i O_{2}

{F e S i O}_{3}

Which of the following is used as a reducing agent in the extraction of iron metal ?

(a) coal

(b) bitumen

(d) coke

S i O_{2}

Which of the following is not obtained in the extraction of Iron?

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