1.

For themetallurgicalprocesofwhich oftheorescalcinedorecanbereducedbycarbon ?

Answer»

haematite
CALAMINE
ironpyrites
sphalerite

Solution : `Fe_ 2O_3`(haematite ) andZnO(obtaineduponcalcinationofcalamine ,` ZN CO_3overset(Delta) toZnO+CO_ 2 ) `beingoxidescan bereducedbycarbon. Ontheotherhand,iron pyrites`(FeS_2) `and sphalerite (ZnS) beingsulphideorescannotbereducedbycarbon.


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