The reactions which does/do not occur in the reduction zone in the extraction of iron from haematite ore is

Solution:

Extraction of iron is based on the reduction of Haematite $F{e}_2{O}_3$ with carbon.

In reduction zone following reactions took place:

$F{e}_2{O}_3+CO\to 2Feo+C{O}_2$

$FeO+CO\to Fe+C{O}_2$

In fusion Zone  at higher temperature following reaction took place:

$F{e}_2{O}_3+3C\to 2Fe+3CO$

Reaction in slag formation:

$CaO+Si{O}_2\to CaSi{O}_3$
Hence option C and D are correct as this reaction doesn't took place in reduction zone.