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Q.

Role of limestone used in the extraction of iron metal is

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a

Purification of iron formed

b

Oxidation of iron ore 

c

Formation of slag 

d

Reduction of iron ore 

answer is C.

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Detailed Solution

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Lime stone is used to remove impurities 

CaCO3  →∆CaO  + CO2 CaO  + SiO2 →CaSiO3slag 

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