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Mark the wrong statement among the following. The iron ore after washing is roasted with a little coal in excess of air. During roasting

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The mass becomes compact and thus makes it suitable for ready reduction to metallic iron.

Any ferrous oxide is oxidised to ferric oxide

moisture is removed

$S$ and As are removed in the form of their volatile oxides

answer is D.

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Detailed Solution

When Iron ore reacts with $O_{2}$ iron oxide forms and moisture is removed, as $S$ is removed.
Then further iron oxide reacts with Coal and Iron and carbon monoxide is formed.

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