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Q.

Consider the following statements in the extraction of iron from haematite:(I) CO is the main reducing agent(II) Fe2O3 is used to oxidise the impurities in Bessemer process(III) In basic oxygen process, air is used to oxidise the impurities(IV) When air is used to oxidise the impurities, iron nitride is formed in ironPick the correct set of statement(s):

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a

I, IV

b

I, II

c

I, II and III

d

I, II and IV

answer is A.

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Detailed Solution

In BOP (Basic oxygen process), impurities in iron are oxidised by pure oxygen. If impurity is oxidised by air, small amount of Fe changes to Fe3N.
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