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# Identify the reaction that does not take place in blast fumace.

$(a)\;CaCO_3 \longrightarrow CaO+CO_2 \\(b)\;2Fe_2O_3 \longrightarrow 4Fe+3CO_2 \\(c)\;CO_2+C \longrightarrow 2CO \\ (d)\;CaO+SiO_2 \longrightarrow CaSiO_3$

$2Fe_2O_3 \longrightarrow 4Fe+3CO_2$ is correct.
Hence b is the correct answer.