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In the metallurgy of iron, when CaCO3 is added to blast furnace, what is formed 

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In the metallurgy of iron, when CaCO3 is added to blast furnace, what is formed 

(a) CaO 

(b) metallic Ca 

(c) gangue 

(d) slag

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(a) CaO 

At high temperature, CaCO3 decompose to CaO and CO2 as follows

\(\underset{Limestone}{CaCO_3}\xrightarrow{\triangle}\underset{Flux}{CaO}+CO_2\)

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